Official Zip Code NameMonmouth
Zip Code StateIllinois
Primary County: Warren
Area Code309
Current Population:37081
Racial Majority:White 62.49%
Median Household Income$55618
Average Adjusted Gross Income$89060
Time Zone:6
Elevation Range763 ft.
Area142.231 Sqm.
Coordinates(Y,X)40.910976, -90.652246