Polk County

Osceola
Polk
Shelby
Stromsburg
HASC code :US-NE-PO
FIPS 6-4 code :31143
Capital :Osceola
Largest city :Stromsburg
Elevation :High : Polk 1,740 ft
Low : Shelby 1,637 ft
Population :5,639
Land Area :439 sq mi
(1,137 km²)
Density :12.85/sq mi
(4.96/km²)
Time zone :UTC -6