Rock Island County

Andalusia
Carbon Cliff
Coal Valley
Cordova
Coyne Center
East Moline
Hampton
Hillsdale
Milan
Moline
Oak Grove
Port Byron
Rapids City
Reynolds
Rock Island
Silvis
HASC code :US-IL-RO
FIPS 6-4 code :17161
Capital :Rock Island
Largest city :Moline
Elevation :High : Reynolds 800 ft
Low : Milan 0 ft
Population :149,374
Land Area :427 sq mi
(1,106 km²)
Density :349.82/sq mi
(135.07/km²)
Time zone :UTC -6
Website :http://www.co.rock-island.il.us