73rd is the ordinal form of the number 73. 73rd or Seventy-third may also refer to:
A fraction, , equal to one of 73 equal parts
Geography 73rd meridian east, a line of longitude 73° east of Greenwich 73rd meridian west, a line of longitude 73° west of Greenwich 73rd parallel north, a circle of latitude that is 73° north of the Earth's equatorial plane, in the Arctic 73rd parallel south, a circle of latitude that is 73° south of the Earth's equatorial plane, in the Antarctic
Military 73rd (Perthshire) Regiment of Foot also known as MacLeod's Highlanders after its founder John Mackenzie, Lord MacLeod 73rd Carnatic Infantry, an infantry regiment of the British Indian Army 73rd Cavalry Regiment, a Cavalry Regiment in the U.S. Army first formed in 1941 73rd Field Artillery Regiment, a Field Artillery regiment of the United States Army 73rd Grey Cup, the 1985 Canadian Football League championship game at Olympic Stadium, Montreal 73rd Illinois Infantry Regiment, an infantry regiment that served in the Union Army during the American Civil War 73rd Indiana Infantry Regiment, an infantry regiment that served in the Union Army during the American Civil War 73rd Infantry Division (Wehrmacht), a German military unit which served during World War II 73rd Infantry Regiment (France), a French infantry regiment 73rd New York Infantry Regiment, an infantry regiment of Union Army in the American Civil War 73rd Ohio Infantry Regiment, an infantry regiment in the Union Army during the American Civil War 73rd Regiment of Foot (Invalids), an infantry regiment of the British Army from 1762 to 1768
Government 73rd Delaware General Assembly, a meeting of the legislative branch of the state government 73rd Oregon Legislative Assembly, the Oregon Legislative Assembly (OLA)'s period from 2005 to 2006 73rd United States Congress, a meeting of the legislative branch of the United States federal government California's 73rd State Assembly district, one of 80 districts in the California State Assembly
Other 73rd Academy Awards honored the best films of 2000 and was held on March 25, 2001 73rd century 73rd century BC
See also 73 (disambiguation) AD 73, the year 73 (LXXIII) of the Julian calendar