Concordia -- U.S. Parish in Louisiana Population (2000): 20247 Housing Units (2000): 9148 Land area (2000): 695.909959 sq. miles (1802.398443 sq. km) Water area (2000): 52.771593 sq. miles (136.677792 sq. km) Total area (2000): 748.681552 sq. miles (1939.076235 sq. km) Located within: Louisiana (LA), FIPS 22 Location: 31.577319 N, 91.536230 W Headwords: Concordia Concordia, LA Concordia Parish Concordia Parish, LA