Clark County

Catawba
Crystal Lakes
Donnelsville
Enon
Green Meadows
Holiday Valley
Lawrenceville
New Carlisle
North Hampton
Northridge
Park Layne
South Charleston
South Vienna
Springfield
Tremont City
HASC code :US-OH-CK
FIPS 6-4 code :39023
Capital :Springfield
Largest city :Springfield
Elevation :High : Catawba 1,237 ft
Low : Northridge 0 ft
Population :144,742
Land Area :400 sq mi
(1,036 km²)
Density :361.86/sq mi
(139.71/km²)
Time zone :UTC -5
Website :http://www.co.clark.oh.us