Jefferson County

Belle Rive
Bluford
Bonnie
Dix
Ina
Mount Vernon
Nason
Waltonville
Woodlawn
HASC code :US-IL-JF
FIPS 6-4 code :17081
Capital :Mount Vernon
Largest city :Mount Vernon
Elevation :High : Dix 580 ft
Low : Mount Vernon 0 ft
Population :40,045
Land Area :571 sq mi
(1,479 km²)
Density :70.13/sq mi
(27.08/km²)
Time zone :UTC -6