Military Units Formed in Massachusetts

1st Battalion, Massachusetts Heavy Artillery - 1565 men
1st Regiment, Massachusetts Infantry - 2299 men
1st Regiment, Massachusetts Cavalry - 3375 men
1st Regiment, Massachusetts Heavy Artillery - 3930 men
1st Company, Massachusetts Sharpshooters - 87 men
1st Unattached Company, Massachusetts Infantry (Militia) - 103 men
1st Independent Battery, Massachusetts Light Artillery - 338 men
2nd Regiment, Massachusetts Cavalry - 3632 men
2nd Regiment, Massachusetts Heavy Artillery - 4203 men
2nd Regiment, Massachusetts Infantry - 3349 men
2nd Independent Battery, Massachusetts Light Artillery - 501 men
2nd Company, Massachusetts Sharpshooters - 187 men
2nd Unattached Company, Massachusetts Infantry - 128 men
2nd Unattached Company, Massachusetts Infantry (Militia) (100 days, 1864) - 99 men
2nd Unattached Company, Massachusetts Infantry (Militia) (90 days, 1864) - 95 men
2nd Unattached Company, Massachusetts Infantry (Militia) - 2 men
3rd Regiment, Massachusetts Cavalry - 3341 men
3rd Regiment, Massachusetts Heavy Artillery - 2864 men
3rd Battalion, Massachusetts Riflemen (Militia) - 351 men
3rd Regiment, Massachusetts Infantry - 1202 men
3rd Unattached Company, Massachusetts Infantry (Militia) - 91 men
3rd Independent Battery, Massachusetts Light Artillery - 385 men
3rd Regiment, Massachusetts Infantry (Militia) - 485 men
4th Regiment, Massachusetts Heavy Artillery - 2300 men
4th Regiment, Massachusetts Cavalry - 2645 men
4th Regiment, Massachusetts Infantry - 1086 men
4th Regiment, Massachusetts Infantry (3 months, 1861) (Militia) - 648 men
4th Battaliion, Massachusetts Infantry (Militia) - 159 men
4th Independent Battery, Massachusetts Light Artillery - 440 men
4th Unattached Company, Massachusetts Infantry (Militia) - 103 men
4th Regiment, Massachusetts Infantry (Militia) - 38 men
5th Regiment, Massachusetts Cavalry (Colored) - 1517 men
5th Regiment, Massachusetts Infantry (100 days, 1864) (Militia) - 1059 men
5th Regiment, Massachusetts Infantry (9 months, 1862-63) - 1107 men
5th Regiment, Massachusetts Infantry (3 months, 1861) (Militia) - 851 men
5th Unattached Company, Massachusetts Infantry (Militia) - 106 men
5th Regiment, Massachusetts Infantry (Militia) - 21 men
5th Independent Battery, Massachusetts Light Artillery - 404 men
5th Regiment, Massachusetts Heavy Artillery - 4 men
6th Regiment, Massachusetts Infantry (3 months, 1861) (Militia) - 792 men
6th Regiment, Massachusetts Infantry (100 days, 1864) (Militia) - 1068 men
6th Independent Battery, Massachusetts Light Artillery - 667 men
6th Regiment, Massachusetts Infantry (9 months, 1862-63) - 1059 men
6th Regiment, Massachusetts Infantry (Militia) - 31 men
6th Unattached Company, Massachusetts Infantry (Militia) - 84 men
7th Independent Battery, Massachusetts Light Artillery - 590 men
7th Regiment, Massachusetts Infantry - 1762 men
7th Unattached Company, Massachusetts Infantry (Militia) - 115 men
8th Regiment, Massachusetts Infantry (Militia) - 30 men
8th Regiment, Massachusetts Infantry (9 months, 1862-63) - 1120 men
8th Regiment, Massachusetts Infantry (100 days, 1864) Militia - 1004 men
8th Independent Battery, Massachusetts Light Artillery - 170 men
8th Unattached Company, Massachusetts Infantry (Militia) - 106 men
8th Regiment, Massachusetts Infantry (3 months, 1861) Militia - 888 men
8th Regiment, Massachusetts Cavalry - 12 men
9th Regiment, Massachusetts Infantry - 3012 men
9th Independent Battery, Massachusetts Light Artillery - 397 men
9th Unattached Company, Massachusetts Infantry (Militia) - 112 men
10th Independent Battery, Massachusetts Light Artillery - 367 men
10th Regiment, Massachusetts Infantry - 1850 men
10th Unattached Company, Massachusetts Infantry (Militia) - 104 men
10th Regiment, Massachusetts Heavy Artillery - 4 men
11th Regiment, Massachusetts Infantry - 2871 men
11th Independent Battery, Massachusetts Light Artillery - 224 men
11th Independent Battery, Massachusetts Light Artillery (9 months, 1862-63) - 161 men
11th Unattached Company, Massachusetts Infantry (Militia) - 104 men
12th Regiment, Massachusetts Infantry - 2117 men
12th Independent Battery, Massachusetts Light Artillery - 444 men
12th Unattached Company, Massachusetts Infantry (Militia) - 105 men
13th Regiment, Massachusetts Infantry - 1953 men
13th Independent Battery, Massachusetts Light Artillery - 494 men
13th Unattached Company, Massachusetts Infantry (Militia) - 99 men
14th Independent Battery, Massachusetts Light Artillery - 234 men
15th Regiment, Massachusetts Infantry - 2740 men
15th Independent Battery, Massachusetts Light Artillery - 522 men
15th Unattached Company, Massachusetts Infantry (Militia) - 99 men
16th Regiment, Massachusetts Infantry - 1910 men
16th Independent Battery, Massachusetts Light Artillery - 186 men
16th Unattached Company, Massachusetts Infantry (Militia) - 90 men
16th Unattached Company, Massachusetts Infantry - 2 men
17th Unattached Company, Massachusetts Infantry (Militia) (100 days, 1864) - 108 men
17th Regiment, Massachusetts Infantry - 2998 men
17th Unattached Company, Massachusetts Infantry (Militia) - 5 men
17th Unattached Company, Massachusetts Infantry - 101 men
17th Unattached Company, Massachusetts Infantry (Militia) (1 year, 1864-65) - 4 men
18th Regiment, Massachusetts Infantry - 1832 men
18th Unattached Company, Massachusetts Infantry (Militia) (100 days, 1864) - 96 men
18th Unattached Company, Massachusetts Infantry - 102 men
19th Regiment, Massachusetts Infantry - 2961 men
19th Unattached Company, Massachusetts Infantry (1 year, 1864-65) - 42 men
19th Unattached Company, Massachusetts Infantry (Militia) - 85 men
20th Regiment, Massachusetts Infantry - 4941 men
20th Unattached Company, Massachusetts Infantry (1 year,1864-65) - 102 men
20th Unattached Company, Massachusetts Infantry (100 days, 1864) (Militia) - 107 men
20th Unattached Company, Massachusetts Heavy Artillery - 7 men
21st Regiment, Massachusetts Infantry - 1836 men
21st Unattached Company, Massachusetts Infantry - 102 men
21st Unattached Company, Massachusetts Infantry (100 days, 1864) (Militia) - 112 men
21st Regiment, Massachusetts Heavy Artillery - 3 men
22nd Regiment, Massachusetts Infantry - 2115 men
22nd Unattached Company, Massachusetts Infantry (Militia) - 102 men
23rd Regiment, Massachusetts Infantry - 1697 men
23rd Unattached Company, Massachusetts Infantry (Militia) - 139 men
24th Regiment, Massachusetts Infantry - 2312 men
24th Company Unattached, Massachusetts Infantry - 101 men
25th Regiment, Massachusetts Infantry - 2034 men
25th Company Unattached, Massachusetts Infantry - 106 men
26th Regiment, Massachusetts Infantry - 2032 men
26th Company Unattached, Massachusetts Infantry - 113 men
27th Regiment, Massachusetts Infantry - 2659 men
27th Company Unattached, Massachusetts Infantry - 128 men
28th Regiment, Massachusetts Infantry - 3407 men
29th Regiment, Massachusetts Infantry - 2088 men
29th Company Unattached, Massachusetts Heavy Artillery - 212 men
30th Regiment, Massachusetts Infantry - 2838 men
30th Company Unattached, Massachusetts Heavy Artillery - 165 men
31st Regiment, Massachusetts Infantry - 2030 men
32nd Regiment, Massachusetts Infantry - 3239 men
33rd Regiment, Massachusetts Infantry - 1817 men
34th Regiment, Massachusetts Infantry - 1839 men
35th Regiment, Massachusetts Infantry - 2191 men
36th Regiment, Massachusetts Infantry - 2122 men
37th Regiment, Massachusetts Infantry - 1744 men
38th Regiment, Massachusetts Infantry - 1323 men
39th Regiment, Massachusetts Infantry - 1891 men
40th Regiment, Massachusetts Infantry - 1312 men
40th Regiment, Massachusetts Militia Infantry - 9 men
42nd Regiment, Massachusetts Infantry (100 days, 1864) (Militia) - 2361 men
42nd Regiment, Massachusetts Infantry - 5 men
43rd Regiment, Massachusetts Infantry (Militia) - 1247 men
44th Regiment, Massachusetts Infantry (Militia) - 1105 men
45th Regiment, Massachusetts Infantry (Militia) - 1192 men
46th Regiment, Massachusetts Infantry (Militia) - 1106 men
47th Regiment, Massachusetts Infantry (Militia) - 1494 men
48th Regiment, Massachusetts Infantry (Militia) - 1534 men
49th Regiment, Massachusetts Infantry (Militia) - 1169 men
50th Regiment, Massachusetts Infantry (Militia) - 1234 men
51st Regiment, Massachusetts Infantry (Militia) - 1150 men
52nd Regiment, Massachusetts Infantry (Militia) - 1073 men
53rd Regiment, Massachusetts Infantry (Militia) - 1114 men
54th Regiment, Massachusetts Infantry (Colored) - 1586 men
55th Regiment, Massachusetts Infantry (Colored) - 1289 men
56th Regiment, Massachusetts Infantry - 1667 men
57th Regiment, Massachusetts Infantry - 2093 men
58th Regiment, Massachusetts Infantry - 1381 men
59th Regiment, Massachusetts Infantry - 1455 men
60th Regiment, Massachusetts Infantry (Militia) - 1081 men
61st Regiment, Massachusetts Infantry - 1323 men
62nd Regiment, Massachusetts Infantry - 497 men
Boston Cadets, Massachusetts Infantry (Militia) - 117 men
Cook's Company, Massachusetts Light Artillery - 114 men
Staten's Company, Massachusetts Infantry (Militia) - 110 men
Salem Cadets, Massachusetts Infantry (Militia) - 135 men
Unassigned, Massachusetts - 17 men
Unidentified Massachusetts - 159 men

A total of 152 units were formed in Massachusetts for service in the War. Many men from Massachusetts also served in the Navy.