149th Indiana Infantry Regiment
Active	March 1 – September 27, 1865
Disbanded	September 27, 1865
Country	United States
Allegiance	Union
Branch	Infantry
Size	Regiment[note 1]
Garrison/HQ	Decatur, Alabama
Engagements	American Civil War
Commanders
Colonel	William H. Fairbanks[1]
Lt. Colonel	William D. Mull[1]
Major	Thomas B. Reeder[1]

The 149th Indiana Infantry Regiment was an infantry regiment from Indiana that served in the Union Army between March 1 and September 27, 1865, during the American Civil War.

The regiment was recruited from the 7th district, and was organized at Indianapolis, Indiana, with a strength of 1,041 men^[1] and mustered in on March 1, 1865.^[1][2] It left Indiana for Nashville, Tennessee on March 3. It was then ordered to Decatur, Alabama for guard and garrison duty until late September. Whilst at Decatur, the regiment received the surrender of Generals Roddey and Polk.^[1] The regiment was mustered out at Nashville, on September 27, 1865.^[1][2] During its service the regiment incurred thirty-eight fatalities, and another twenty-seven men deserted.^[1]

• List of Indiana Civil War regiments

• Dyer, Frederick H. (1959). A Compendium of the War of the Rebellion. New York and London. Thomas Yoseloff, Publisher. LCCN 59-12963.
• Holloway, William R. (2004). Civil War Regiments From Indiana. eBookOnDisk.com Pensacola, Florida. ISBN 1-9321-5731-X.
• Terrell, W.H.H. (1867). The Report of the Adjutant General of the State of Indiana. Containing Rosters for the Years 1861–1865, Volume 7. Indianapolis, Indiana. Samuel M. Douglass, State Printer.

• George Washington Harris Civil War Diary, The University of Alabama in Huntsville Archives and Special Collections Diary of George Washington Harris, a 1st Sergeant in the 149th Indiana Infantry Regiment, Company F.