<P> As of 2010 , Shelby County was both Tennessee 's most populous county , with 927,644 residents , and the largest county in area , covering an area of 755 sq mi ( 1,955 km ) . The least populous county was Pickett County ( 4,945 ) and the smallest in area was Trousdale County , covering 114 sq mi ( 295 km ) . As of the same year , Davidson County , in which the capital Nashville is located , covers 502 sq mi ( 1,300 km ) with a population of 569,891 . The population of the state of Tennessee as of the 2000 census was 5,689,283 in an area of 42,169 sq mi ( 109,217 km ) . The oldest county is Washington County , founded in 1777 . The most recently formed county is Chester County ( 1879 ) . </P>
<P> As of 2010 , Shelby County was both Tennessee 's most populous county , with 927,644 residents , and the largest county in area , covering an area of 755 sq mi ( 1,955 km ) . The least populous county was Pickett County ( 4,945 ) and the smallest in area was Trousdale County , covering 114 sq mi ( 295 km ) . As of the same year , Davidson County , in which the capital Nashville is located , covers 502 sq mi ( 1,300 km ) with a population of 569,891 . The population of the state of Tennessee as of the 2000 census was 5,689,283 in an area of 42,169 sq mi ( 109,217 km ) . The oldest county is Washington County , founded in 1777 . The most recently formed county is Chester County ( 1879 ) . </P>
what is the largest county in population in tennessee
what is the largest county in population in tennessee
Shelby County
Shelby County