149th Regiment may refer to:
149th Armored Regiment, United States 149th Aviation Regiment, United States 149th Infantry Regiment (United States) 149th Regiment Royal Armoured Corps, Britain 149th (Lancashire Hussars) Regiment, Royal Horse Artillery, Britain 149th (Sherwood Foresters) Light Anti-Aircraft Regiment, Royal Artillery, Britain
American Civil War regiments 149th Illinois Infantry Regiment 149th Indiana Infantry Regiment 149th New York Infantry Regiment 149th Ohio Infantry Regiment 149th Pennsylvania Infantry Regiment
See also 149th Division (disambiguation)