171st Air Refueling Wing
171st Air Refueling Squadron
171st meridian
171st Infantry Brigade (United States)
171st Aviation Regiment (United States)
171st Special Operations Aviation Squadron
171st Field Artillery Regiment
171st Ohio Infantry Regiment
171st Battalion (Quebec Rifles), CEF
171st Field Regiment, Royal Artillery
171st Tunnelling Company
48th Infantry Division (Wehrmacht)
171st meridian east
171st Rifle Division
171st meridian west
171st (2/1st Liverpool) Brigade
171st Siege Battery, Royal Garrison Artillery
171st Division (People's Republic of China)
Pennsylvania House of Representatives, District 171
1979–1980 Massachusetts legislature
171st New York State Legislature
Pope Lucius III
Army Medical Department (United States)
List of numbered streets in Manhattan