Locomotive names of North America beginning with M

Name	Railroad, #	Builder, s/n	Build date	Whyte type	Notes
M. C. Humphrey	TT 3	Brooks 375	2/1880	2-6-0	NG; Scrapped 1886; boiler used as stationary pump at Tyler.
M. G. Bright	M&I	Baldwin	c. 1846	0-8-0
M. G. Elliott	CV 85	CV St Albans	1873	4-4-0	Rn 1874 #16 to replace Roxbury; sold 10/1894 NLN; rn 1/1/1900 #43.
M. G. Howe	H&TC 30	Schen 661	10/1870	4-4-0
M. H. Grinnell	HR	Cooke	1862	4-2-4T
M. K. Jessup	R&M	Rogers 648	2/1856	4-4-0	May have been named H. H. Durand. Became WU #9 E. F. Barnes in 1867; became CM&SP #256 in 1879; rb 1883; scr 1892.
M. Kenedy	SA&AP 4	Baldwin 7762	12/1885	2-6-0	Rn 1908 #101; off roster by 1917.
M. M. Strong	R&M	Rogers 682	6/1856	4-4-0	May have been named Wm. C. Allen.
M. Magiff	CV 93	Baldwin 10472	1/1890	2-6-0	Rn 1/1/1900 #322.
M. Maynard	LIRR	Rogers 270	7/1851	4-4-0
M. S. Colburn (1st)	B&R 1st 11	Brooks 189	1873	4-4-0	Ex- NYB&M #3; Renumbered 2nd #7.
M. S. Colburn (2nd)	B&R 2nd 11	Schen 1918	1884	4-4-0	Sold to Rutland as #170; Renumbered #793.
M. S. Latham	NPC 9	Baldwin 3749	1875	4-4-0	Wrecked 2/14/1894; rb 1894; parts used to build #17; wrecked & rb 1900 as #21 Thomas Stetson; scrapped 1905.
Macagua	Juc	Rogers 126	4/1848	4-4-0
Macomb	NCI	Rogers 596	8/1855	4-4-0
Macon	M&Oh	Rogers 503	10/1853	4-4-0	Originally built as serial number 434 for the Lexington & Danville Railroad as John Barkley but not delivered there; reassigned to serial number 503 and sold 6/27/1854 to Mobile & Ohio as Macon.
(Madam Queen)	ATSF 5000	Baldwin	1930	2-10-4	Never officially named by AT&SF. More information: Wikipedia.
Madawaska	SL&A 1st 8	Brooks 2670	1896	4-6-0	Sold to Lake Shore & Michigan Southern as #604; Renumbered #546; Renumbered #5018.
Madison	CR&B	Rogers 397	5/1853	4-4-0
Madison	LC&M	Lawrence	1857	4-4-0	Became M&SP #35 in 1863; off roster by 1899.
Madison	M&I	Rogers 236	11/1850	4-4-0
Madison	NYOW 2	Rhode 102	4/1869	4-4-0	Sold 10/22/1887 to NY Loco Works; sold 4/1888 to Centralia & Chester RR.
Madison	USM	Norris
Magdalena	FCDS 9	Rogers 2733	4/1881	4-4-0	S 1882 to FCCM.
Magpie	CP 141	Schen 516	10/1868	4-4-0	Rb 8/14/1871; rn 1891 #1146; scr 9/28/1892.
Mahulia	KRR 3			0-4-2T
Maine	B&M	Hinkley	6/1847	4-6-0
Maj. Gen. Hancock	Adir 1	Cooke	1864	4-4-0	Rn #3.
Maj. W. R. Sterling	LF&SH 2	Baldwin		0-6-0
Majestic	CP 45	M & Aldus	8/1867	4-6-0	Rn 1891 #1531, #1052; in Rocklin fire 11/27/1873; rb 12/1873; scr 6/30/1919 Sac.
Major Cornell	R&S 40	Schen 725	1871	4-4-0	To D&H #135; rn 419; off roster by 1902.
Major Nolton	C&A 93			4-4-0
Major Sykes	D&HG 1	Cooke	1860	0-4-0	Wrecked 1871; rb 1872 to 0-6-0; scrapped 1/1889.
Major Whistler	NCe 12	Winans	10/1849	4-4-0	Off roster by 1875.
Malone	CP 39	M & Aldus	6/1867	4-6-0	Rn 1891 #1529; rn 1901 #2002; rb 1889; to Cal. Western #8 10/25/1910.
Malone	O&LC 2nd 8	M & Aldus	1867	4-4-0	Rn 1/1/1891 #308; scrapped 11/27/1895.
Mamakating	NYOW 39	Baldwin 2666	1/1872	4-4-0	Scrapped 4/1900.
Manchester	ATSF 150	Hinkley	1880	4-4-0
Manchester	B&R 1st 6	Rogers 765	1857	4-4-0	Ex-Long Island Rail Road Pacific 8/1869.
Manchester	HERR 6
Manchester	WV	Hinkley 405	10/1852	4-4-0	Leased to Troy & Boston; Transferred to Bennington & Rutland.
Mancos	D&RG 38	Baldwin 4810	1879	2-8-0
Manfred	USM	Norris		4-4-0	Acquired new on 1/15/1863; sold 1865 to B&O.
Manhattan	ORR	Rogers 32	10/1841	4-4-0	7' gauge.
Manitou	SL&A 15	Brooks 2667	1896	4-8-0	Sold to BR&P as #139; Sold to Cumberland & Manchester as #56.
Mansfield	B&L	Mason		0-6-6T	Transferred to CV in 1889.
Mansfield	CV 55	M & Aldus	6/1865	4-4-0	Rb & rn J. H. Kimball 1882.
Mansfield	M&SC	Rogers 59	10/1844	4-2-2	5 ft 4 in gauge.
Manuel Dublan	FCMYG 3	Rogers 4142	7/1889	4-4-0	Rn 1902 #56.
Manuel Fernandez	FCMYG 7	Rogers 4273	3/1890	4-4-0	Rn 1902 #51.
Manuel Mendoza Cortina	MoRR 5
Manzanares	ATSF 64	Baldwin 4358	6/1878	4-4-0
Mapimi	MRR	Baldwin 15047	9/1896	0-4-2T
Mapleton	O&T 17	Baldwin 5992	1/1882	2-8-0	John Forbes was the designated engineer of this engine; rn 1883 #23; s 1889 to NY Equipment Co.; s 6/1910 to Vaccaro Brothers RR in Honduras.
Maquoketa	DNW	Rhode 201	9/1870	4-4-0	Became CM&SP #291 in 1879; off roster by 1899.
Marcus Duarte	FCUY 25	Baldwin 9873	2/1889	4-4-0	Ex-M&V #5; scr.
Marietta	CR&B	Rogers 398	5/1853	4-4-0
Marin	NPC 11	Baldwin 3842	2/1876	4-4-0	Became NWP #82; scr 1911.
Marin	SF&NP 9	Grant 1664	1883	4-4-0	Became NWP #9; converted to stationary boiler 5/15/1938.
Marion	ATSF 356	Taunton 720	12/1879	4-6-0	Rn #117, #437.
Marion	DSW	Mason 93	3/1860	4-4-0	Became CM&SP #288 in 1879; off roster by 1893.
Marion	L&N	M & Richardson
Marion	M&SP 163	Taunton 575	7/1872	4-4-0	Rn #1282 in 1899; rn #1448 in 1910; off roster in 1913.
Marion Wentworth	GH&SA 28	Hinkley 1235	1876	4-4-0	Rn 1885 #677; s 1870s to Gulf, Western Texas & Pacific Railway #8; off roster by 1900.
Mariposa	WP G	Norris-L	1864	4-4-0	Became Central Pacific 2nd #31; Rn 1891 #1193; rn 1901 #1215, #1488; rb 1874; s to Atlantic Equipment Co 1/6/1909; to CP 6/1870; became Stockton Terminal & Eastern #1 1/1909; donated to Travel Town (Los Angeles) 7/1953.
Mariscal	FCMS 11	Yorkshire 435	1890	0-6-0T
Marmora	B&A 39	B&A	1876	4-4-0	Preserved at the National Museum of Transport in St. Louis.
Mars		Winans 61			Camelback loco.
Mars	CP 78	Rhode 52	4/1868	4-4-0	Rn 1891 #1203; rn 1901 #1224; rn 1906 #1495; scr 7/29/1909 W Oakland.
Mars	H&NH 28	Rhode Island	1867	4-4-0
Mars	SRR	Baldwin 1484	5/1866	4-4-0	Off roster after 1877.
Marsh Kasson	LC&M 23	Lawrence	9/1857	4-4-0	Ex-M&M 8/1860; became M&SP #23 in 1863; off roster by 1892.
Marshfield	M&WR 3	Manch 574	4/1873	4-4-0	S to Boston, Concord & Montreal 2nd #1 Granite State; became Boston & Lowell #103 1884; to Concord & Montreal #64 1889; rb 1892; became B&M #764 1900; scr 1907.
Martin E. Denny	WV	Hinkley 339	11/1851	4-4-0	Leased to Troy & Boston; Transferred to Bennington & Rutland.
Martin Van Buren	B&O			0-4-0	Given to Maj. Pangborn to look like earlier locos in 1892; rn Mazeppa.
Mary Jane	1			0-4-4T	Preserved on static display in Opelousas, Louisiana.
Maryland	N&F	Stephenson	1832	0-4-0
Maryland	WRR	Winans	1841	0-8-0	Geared engine with a vertical boiler.
Marysville	CalP 2	Mason 246	2/1867	4-4-0	Rn 2nd #6 c. 1869; rn 1891 #1162; scr 1/13/1897 Sacramento.
Marysville	CaN 2	Norris	1861	4-4-0	Became NCa #2; rn 1891 #1103; scr 1892.
Mason City	M&SP 187	Taunton 618	6/1873	4-4-0	Rn #1314 in 1899; off roster in 6/1913.
Massachusetts	H&NH	Rogers 114	12/1847	4-4-0
Massachusetts	Hou	Rogers 89	10/1846	4-4-0
Massachusetts	P&R	Hinkley	6/1849	4-4-0	Inside connected with outside riveted iron-clad wooden frame.
Mastodon	CP	CP Sacramento	4/1882	4-8-0	World's first successful 4-8-0; led to the development of El Gobernador. More information: Wikipedia.
Matachin	Pan	Portland	1854	0-4-0
Matanzera	M&Sa	Rogers 51	1/1844	4-4-0	Some documents show this locomotive's name spelled as Matancera, but judging by the railroad name, the spelling with a "z" seems more likely to have been used.
Matehuala	VC&RV 2
Matt H. Shay	Erie	Baldwin	4/1914	2-8-8-8-2
Mattawa	SL&A 1st 6	Brooks 2668	1896	4-6-0	Sold to Lake Shore & Michigan Southern as #602; Renumbered #544; Renumbered #5019.
Maui	MAC 2	Baldwin	1904	2-6-0
May Queen	USM	Norris		4-4-0	Acquired new on 1/28/1863; sold 1865 to B&O.
Mayflower	OC	H & Drury 47	8/1845	4-2-0	Sold to Montreal & Plattsburgh RR; Became Ogdensburgh & Lake Champlain 1st #28 Chazy.
Mayor Flippin	M&C	Baldwin	1876
Mazeppa	B&O	G & Winans	1838	0-4-0	Ex-Martin Van Buren.
Mazeppa	SRR	Baldwin 951	8/1860	4-4-0	Off roster after 1877.
Mazeppa	V&J	Baldwin 48	9/1836	4-2-0	Rn Commercial; sometimes listed as 0-6-0; off roster by 5/1866; listed in Railway & Locomotive Historical Society bulletin #101 as Commercial RR.
Mazeppa	W&A	Rogers 359	12/1852	4-4-0
Mazomanie	M&SP 86	Portland 72	9/1854	4-4-0	Ex-M&M #16 E. D. Holton.
McDonough	NYOW 44	Baldwin 2724	3/1872	4-4-0	Scrapped 4/1900.
McDowell	A&P 31	Manch 1033	11/1882	4-4-0
McKenzie	A&P 35	Manch 1037	1/1883	4-4-0
McKim	B&O	G & Winans	1838	0-4-0
McNeill	CCRR	Stephenson 103	2/1835	4-2-0	Built for the Paterson & Hudson River RR; to New York & Erie RR; sold 1855 to Isaac Atkinson; to CCRR 1855; stored at Carrollton 1859-1867; this engine may have been the first to operate in North America with a bell.
Medford	BL&N		c. 1869
Meily	SFS 3	Baldwin 5258	9/1880	2-8-0	Ex-Texas, Santa Fe & Northern #3.
Memnon	B&O 57			0-8-0	Preserved at the B&O Railroad Museum in Baltimore.
Memphis	Va&T	Baldwin	8/1857	4-4-0
Menasha	M&N 7	Baldwin 3012	11/1872	4-4-0	Rn #22; became CM&SP #922 in 1893; rn #1297 in 1899; rn #1459 in 1910; rn #152 in 1913; off roster 6/1914.
Menlo Park	SF&SJ 11	Mason 353	4/1870	4-4-0	To SP #11; rn 1891 #1167; scr 2/5/1898.
Menomonee	M&M 3	Souther	1850	4-4-0	Became M&PDC #3 in 1861; became M&SP #73 Chandler in 1868; off roster by 1888.
Meramec	PacMo 2	Rogers 337	9/1852	4-4-0	5 ft 6 in gauge.
Merced	CP 172	Norris-L 37	1864	4-4-0	Rb 10/2/1872 as 4-6-0; rb 2/15/1877 as 4-4-0; rn 1891 #1284; rn 1901 #1522; scr 1/24/1910 W. Oakland.
Merced	WP F	Norris-L
Mercedes	FCUY 56	Baldwin 10495	1/1890	4-4-0	Ex-FCM&P #6; scr 1927.
Mercer	NC&F 2	Pittsburgh	1874	0-6-0
Mercer	NCI	Rogers 606	9/1855	4-4-0
Mercury	B&O	E & Harrison	1842	4-4-0	Most durable loco of its time (37,000 miles in 1844).
Mercury	CP 127	M & Aldus	8/1868	4-4-0	Rn 1891 #1137; rn 1901 #1200; rn 1906 #1484; sold 8/25/1911 to Carlton & Coast #2.
Mercury	LNA&C 7	Norris	1851	4-4-0	Ex-NA&S Bloomington.
Merida (1st)	FCUY 22	Baldwin 7129	2/1884	4-4-0	Ex-M&V #2; scr 1903.
Merida (2nd)	FCUY 35	Baldwin 13932	1/1894	4-4-0	Ex-FCM&C #5; scr 1933.
Merrill	SCMR 5	Baldwin 9150	3/1888	0-4-2T	Ordered as San Diego Street Car Co #6; diverted to SCMR 9/1888; to SP #5; to engineering dept. 5/23/1905; sold 1907 to Willett & Burr; used in 1913 to extend SP's Coos Bay Branch.
Merrimac	V&T 24	Baldwin 3891	1876	2-6-0	Sold 1901 to Boca & Loyalton RR, Ca; Sold to WP #123; scrapped 6/1930.
Merritt Clark	R&S	Taunton 162	1854	4-4-0	To D&H #114; sold 1878 to Lebanon Springs RR.
Messalonskee	Som 7	Manch 1743	1900	4-4-0	Became MEC #85.
Meteor	Bo&W	Stephenson 26	1832	2-2-0	First loco in Maine; sold 1835 to B&P Canal & RR co; inside connected; rn Pioneer by B&P; possibly scrapped 1865.
Meteor	LNA&C 26	Hinkley 478	9/1853	4-4-0	Ex-NA&S Ellettsville.
Mexcanu	FCUY 33	Baldwin 9537	10/1888	4-4-0	Ex-FCM&C #3; scr 1955.
Mexico	FCCM 1	portland 331	5/1880	2-6-0
Miami	KPDP 12	Rogers 1409	1866	4-4-0
Miami	LMRR	Rogers 91	10/1846	4-4-0
Miami	MR&LE	Rogers 68	7/1845	4-4-0	Originally ordered for the Matanzas & Savanilla Railway but not delivered there; rn February 4, 1846, Huron.
Michigan		Milholland	1852
Michigan	C&NW 138	Hnkley 727		4-4-0
Michigan	CV 38	Baldwin	1851	4-4-0	Rb 4/1857; rb 12/1869; rn 6/1873 Cascadnac.
Michigan	O&LC 1st 15	Essex	3/1852	4-4-0	Scrapped before 1/1/1876.
Michigan City	NA&S	Schen 22	11/1852	4-4-0	Became LNA&C #30 Eclipse in 1859.
Middleburgh	M&S	Cooke	1868	4-2-4T
Middlebury (1st)	R&B 5	Taunton 35	6/1849	4-4-0	Wrecked at Pittsfield in 11/1864; rb by Taunton; Sold 1866 to F&W as Sterling.
Middlebury (2nd)	R&B 5	CV Northfield	8/1866	4-4-0	Rebuilt; became Central Vermont #202 1891; scrapped before 1895.
Middlesex	CV 27	Baldwin	1851	4-4-0	Ex-Saguenay; scrapped 1897.
Middletown	NYOW 36	Baldwin 2618	11/1871	4-4-0	Rb 8/5/1896 at Cooke as 2nd #10.
Mifflin	PRR	Baldwin	7/1849	4-2-2	Returned to Baldwin; rb as 4-4-0.
Mikado	CP 65	M & Aldus	2/1868	4-4-0	Rn 1891 #1199; scr 2/1900 Sacramento.
Milan	W&LE 1	National	4/1877	4-4-0
Miles Sells	TT 65	Grant	12/1883	2-6-0	NG; SG'ed 6/1888; sold 6/1899 to Pine Bluff & Western Ry.
Miles Standish	OC	Hinkley	1845
Millie	EBT 12	Baldwin 37325	12/1911	2-8-2	Named in 1960; last operated in October 2000, stored in the EBT roundhouse as of 2009.
Milton (1st)	CV 9	Baldwin	1850	4-4-0	Rb 10/15/1861; Ex-1st St Albans; wrecked 6/1890.
Milwaukee	GBM&C	Rogers 572	3/1855	4-4-0
Milwaukee	M&SP 75	Schen 11	6/1852	4-4-0	Ex-M&M #5 E. Corning.
Milwaukee	M&SP 161	Mason 475	10/1872	4-4-0	Rn #1280 in 1899; rn #1446 in 1910; off roster by 1913.
Mineral Point	MPt 3	Taunton 214	10/1856	4-4-0	Became CM&SP #429 in 1880; off roster by 1899.
Minneapolis	M&SP 43	Menominee	1854	4-4-0	Ex-Mi&W Hercules.
Minnehaha	M&SP 41	Niles	1854	4-4-0	Ex-Mi&W Oconomowoc.
Minnehaha	P&R	P&R Reading	1859	4-4-0
Minneiska	LC&M 29	Rogers 779	7/1857	4-4-0	Rn #26; became M&SP #26 in 1863; off roster by 1888.
Minnesota	LV 318	Baldwin 3802	1875	4-6-0
Minnesota	P&R				Camelback loco; exploded.
Minnie	C&NW	C&NW Shops	1863		This unit was fitted with a steam brake in 1866 by shop mechanic George W. Cushing.
Minsink	NYOW 30	Baldwin 2551	9/1871	4-4-0	Rb 10/1897 at Cooke as 2nd #13.
Mirimichi	SL&A 1st 7	Brooks 2669	1896	4-6-0	Sold to Lake Shore & Michigan Southern as #603; Renumbered #545; Renumbered #5017.
Mirror Lake	CO&I 12	Dickson 718	7/1889	4-4-0
Missisco	CV 25	H & Drury	1848	4-4-0	Rb 12/1858; rb 2/1870; sold 1873 to Rutland Division as #42.
Mississippi	N&H	Dunham	1836	0-4-0	Rb by IC's McComb shops.
Mississippi	PacMo 9	Rogers 579	5/1855	4-4-0	5 ft 6 in gauge
Mississippi	R&M	Rogers 1042	12/1862	4-4-0
Mississippi	SRR	Baldwin 935	6/1860	4-4-0	Off roster between 1875 and 1877.
Mississippi	V&J	Baldwin 49	9/1836	4-2-0	Off roster by 5/1866; listed in Railway & Locomotive Historical Society bulletin #101 as Commercial RR.
Missouri	H&SJ	Mason	1857	4-4-0
Missouri	PacMo 8	Rogers 575	4/1855	4-4-0	5 ft 6 in gauge
Mitchell	NA&S	Norris	1851	4-4-0	Became LNA&C 5, Arrow, in 1859.
Mogadore	O&T 9	Porter 396	12/1880	4-4-0	To NYEC 1889.
Mogollon	D&RG 92	Baldwin 5118	1880	4-4-0
Mogul	CNJ	Taunton	1866	2-6-0	Possible origin of class name.
Mohammed	CoV 21	Brooks 855	2/1883	2-6-0	S 1885 to Cleveland & Canton RR #21; s 1889 to NY Equip Co.; s 1891 to Shreveport & Houston RR; s 6/1891 to HE&WT &15; s 4/1895 to J. J. White (McCord City, Ms.).
Mohammed	O&T 21	Brooks 855	2/1883	2-6-0	S 1889 to NY Equip Co; s 1889 to Galveston & Western; s to Shreveport & Houston; s 6/1891 to Houston, East & West Texas #15; s 1895 to J. J. White.
Mohave	CP 37	Norris 1189	5/1867	4-4-0	Rn 1891 #1175; rn 1901 #1208; rb 9/13/1872; wrecked 3/3/1869; s 6/1870 to SF&SJ #17; returned as CP #37 1872; scr 1/2/1903 Sacramento.
Mohawk	A&Sc	McQueen	1848	4-4-0	Rb c. 1847; may be first loco built in US with Cylinder saddle.
Mohawk	HR	Matteawan	1849	4-2-2
Mohawk	KPDP 6	Baldwin 1341	1866	4-4-0
Mohawk	R&S	Rogers K&G 213	1850	4-4-0	Became D&H #103; scrapped 1881.
Mohegan
Mohican	M&SC	Rogers 405	7/1853	4-6-0	5 ft 4 in gauge.
Mojanda	D&RG 45	Baldwin 4976	1880	2-8-0
Molly O.	WT			3T Climax
Monarch	BRR 5	Baldwin 33301	3/1909	0-6-2ST	Transferred to Barre & Chelsea as #5 9/18/1913; s 9/1948 to Rock of Ages as #5; scr 10/1959.
Monitor	HR	Cooke	1861	4-2-4T	Rb 1877 as inspection loco; rn Chemung.
Monitor	USM	Jersey City
Mono	B&B 3	Baldwin 3638	1874	2-6-0	Ex-E&P #2 Onward; still running as of 1907.
Mono	CP 23	M & Aldus	8/1866	4-6-0	Rn 1891 #1526, #1051; In Rocklin fire 11/27/1873; rb 1/26/1874; s to Tejunga Rock Co. as #1 2/18/1910.
Monocacy	B&O	Wm Norris	1839	4-2-0	Used on the Washington branch.
Monroe	IR 1			4-4-0
Monroe	M&M 23	Breese Kneeland	1856	4-4-0	Became M&PDC #23 in 1861; became M&SP #93 in 1868; off roster by 1891.
Monroe	NY&E 9	Baldwin
Monroe	NY&E 29	Rogers 156	1/1849	4-4-0
Monroe	USM	Norris
Monson	NLN 5	Hinkley	1851	4-4-0	Inside connected; scrapped 1890.
Monster	C&A	C&A	c. 1836	0-8-0	Axles connected by gears rather than a drive rod.
Montague	NLN 7	Manch	1863	4-4-0	Rn 12/1890 #26; rn 8/1891 #176; transferred to CV as #6; scrapped 1901.
Montana	CP 24	M & Aldus	8/1866	4-6-0	Rn 1891 #1527, #1065; s to Erickson & Petterson Co as #21 6/9/1909; rb by 1891.
Monte Cristo	D&RG 19	Baldwin 3899	1876	2-6-0
Montemorelos	FCMYG 11	Rogers 4367	8/1890	4-6-0	Rn 1902 #458.
Monterey	M&SV 2	Baldwin 3682	1/1875	4-4-0	Sold 1/1880 to Nevada Central as #4; out of service by 1898 and stripped for parts; remains scrapped by United Commercial CO. 1/1938.
Monterey	M&W	Rogers 106	9/1847	4-4-0	Became Western & Atlantic Monterey.
Monterey	W&A	Rogers 106	9/1847	4-4-0	Ex-M&W Monterey.
Monterrey	FCMYG 8	Rogers 4278	3/1890	4-4-0	Rn 1902 #52.
Montezuma	D&RG 1	Baldwin 2549	1871	2-4-0
Montgomery	MR&LE	Rogers 386	4/1853	4-4-0
Montgomery	NA&S	Norris	5/1851	4-4-0	Ex-C&W, acquired in 1853; became LNA&C #28 Traveler in 1859.
Monticello	DNW	Hinkley	1872	4-4-0	Became CM&SP #297 in 1879; off roster by 1899.
Monticello	DSW	Rogers 1629	7/1869	4-4-0	Became CM&SP #290 in 1879; off roster by 1898.
Monticello	NYOW 61	Baldwin 3096	1/1873	2-6-0	Rb 1902 at Rome Machine Works as #119.
Montpelier	CV 24	Boston	4/1852	4-4-0	Rb 12/27/1858; wrecked 1878.
Montpelier	M&WR 1	Manch 572	4/1873	4-4-0	Wrecked at East Montpelier 8/23/1876; rb 11/13/1889; off roster by 1909.
Montreal	CV 11	H & Drury	1850	4-4-0	Rb 11/15/1856; wrecked 1879.
Montreal	R&S 43	Schen 796	1872	4-4-0	To D&H as #138; rn 420; off roster by 1902.
Montreal	S&W			4-4-0
Montrose	LG	Rogers 282	10/1851	4-4-0
Montville	NLN 11	CV St Albans	1879	2-6-0	Replaced Belcherton; rn 12/1890 #10; rn 8/1891 #160; transferred to CV as #305; ex-D. D. Ranlett.
Mooers	Mo&P	Taunton 112	1852	4-4-0	Rb by Taunton 10/1857; rn S. F. Vilas.
Mooresville	NA&S	Hinkley 401	9/1852	4-4-0	Became LNA&C #21 Planet in 1859; rb 1859.
Moosalamoo	R&B 2nd 16	Taunton 448	12/1868	4-4-0	Became Central Vermont #207 1891; Scrapped 1900.
Morelos	MoRR 4
Morena	D&RG 96	Baldwin 5144	1880	4-4-0
Morgan	S&M	Rogers 141	9/1848	4-4-0
Morley	ATSF 65	Baldwin 4359	6/1878	4-4-0
Morris	M&E	Rogers 151	11/1848	4-4-0
Morris Emanuel	SRR	Baldwin 965	9/1860	4-4-0	Ex-Hercules; off roster after 1877.
Morris Ketchum	GR&BC	Rogers 615	10/1855	4-4-0
Morrisania		Rogers 334	8/1852	4-4-0	Moshein & Rothfus note that this locomotive was purchased by Gouverneur Morris, possibly for the NY&H.
Morse	ATSF 92	Hinkley	1879	4-4-0
Mosca (1st)	D&RG 13	Baldwin 3475	10/1873	2-8-0	Returned to Baldwin; s EBT #3 1st Rockhill.
Mosca (2nd)	D&RG 24	Baldwin 4191	1877	2-8-0
Moses Strong	T&R	Taunton 91	1852	4-4-0
Moses Taylor	H&TC 21	Schen 644	7/1870	4-4-0
Mosquito Gulch	D&RG 60	Baldwin5039	1880	2-8-0
Motul	FCUY 26	Baldwin 9964	5/1889	4-4-0	Ex-M&V #6; scr.
Mount Carrol	R&M	Swinburne	7/1856	4-4-0	Rb 1861; scr by 1874.
Mount Carroll	WU 34	Baldwin 3635	8/1874	4-4-0	Became CM&SP #281 in 1879; rn #1336 in 1899; rn #97 in 1910; off roster 3/1918.
Mountain Boy	B&R 8	Schen 563	1869	4-4-0	Renamed Frank C. White; Renamed E. D. Bennett; Sold to Rutland as #60; Renumbered #1060.
Mountain Boy	HERR 7
Mountain Girl	B&R	Schen 564	1869	4-4-0	Renamed C. J. McMaster; Sold to Rutland as #61; Renumbered #1061.
Mountain Girl	HERR 8
Mountain King	BRR 2	Baldwin 9738	1/1889	0-6-0ST	Switched Montpelier yard from 1/7/1891; ran away & wrecked 5/20/1893; rb by 6/17/1891; xf to Barre & Chelsea as #2 9/18/1913; s 1926 Wetmore & Morse Co.; scr 1935.
Mountain View	NYOW 95	Rhode 541	7/1873	2-6-0	Sold 8/19/1917 to Southern Iron & Equip Co as #1210; sold 4/1918 to Limestone Mfg Co as #1.
Mountaineer	D&RG 101	Vulcan	1873	0-4-4-0T	Rn #1001 in 1881.
Mountaineer	CP 83	Rogers 1514	4/1868	4-6-0	Rn 1891 #1545; rb by 1878; scr 2/1893.
Mount Clare	B&O 49	B&O M. Clare		0-8-0	First unit to be built by a railroad.
Mount Vernon	IRR 5	Baldwin 1138	5/1863	0-6-0	To Iron Ry in 1884.
Moxie	Som 5			4-4-0
Mt. Agassiz	D&RG 63	Baldwin 5051	5/1880	2-8-0
Mt. Holly	R&B 12	Taunton 36	9/1849	4-4-0	Rb at Rutland 1866; s 8/29/1878 to D. C. Lindsley of the Burlington & LaMoille as William Hale.
Mt. Hope	OC	Hinkley	1845
Mt. Washington	BC&M 29	Manch 731	6/1876	2-6-0
Muldraugh	L&N	Baldwin
Mule's Relief	ACRy 1	Baldwin 5586	4/1881	0-4-2T
Mumford	Tonw	Rogers 221	7/1850	4-4-0
Muna	FCUY 50	Baldwin 18735	3/1901	4-4-0	Ex-FCM&C #10; scr.
Muncie	LM&B 2	Brooks 271	5/1876	4-4-0	Became LB&M #8.
Muscoda	M&M 39	Breese Kneeland	1857	4-4-0	Became M&PDC #39 in 1861; became M&SP #110 in 1868; off roster by 1890.
Muscogee	SW	Rogers 427	8/1853	4-4-0	Moshein & Rothfus list this locomotive's build date as 8/28/1853, but where it falls in the construction list, it is more likely to have been built in September 1853.
Music Pass	D&RG 52	Baldwin 5002	1880	2-8-0
Myrtle	HRC 3	Dickson	1900	2-4-2
Myrtle	LK&P 3	Porter 7397	1947	2-4-2	Ex-Carbon Limestone Co #35; rb.

Photo credits

• Madam Queen - Cropped from the original file available at the Library of Congress, Prints and Photographs Division; see also this photo's description page in the Flickr Commons project. Photograph by Jack Delano, Farm Security Administration/Office of War Information, March 1943. This photo was taken by an employee of the US Federal Government while performing his official duties and is therefore under public domain. Further, the Rights and Reproductions statement for the FSA/OWI pictures collection (retrieved March 30, 2009) asserts "Photographs in this filing series (LC-USF35 and LC-USW36) are considered to be in the public domain."
• Marion Wentworth - Cropped from a scan of the original photo in the collection of Norb & Marie Novocin of Estate Auctions, Inc. As the locomotive number 28 is visible on the smokebox front, this photograph must have been taken before 1885 when the locomotive was renumbered. Photographer unknown; I believe this photo to be in the public domain because my understanding of current US copyright law is that photographs first published in the US before 1923 are public domain.
• Missouri - Cropped from a scan of the original photo in the collection of Norb & Marie Novocin of Estate Auctions, Inc. Photographer unknown; I believe this photo to be in the public domain because my understanding of current US copyright law is that photographs first published in the US before 1923 are public domain.