Mercer County

Aledo
Joy
Keithsburg
Matherville
New Boston
Seaton
Sherrard
Viola
HASC code :US-IL-ME
FIPS 6-4 code :17131
Capital :Aledo
Largest city :Aledo
Elevation :High : Sherrard 800 ft
Low : Keithsburg 549 ft
Population :16,957
Land Area :561 sq mi
(1,453 km²)
Density :30.23/sq mi
(11.67/km²)
Time zone :UTC -6