|Name :||St. Clair|
|State :||Illinois (IL)|
|Total Cities in this County :||20|
|Total Zipcodes in this County :||31|
St. Clair is a County which belongs to the state Illinois in United States of America. There are total 20 cities in this county. Total number of zipcodes/pincodes in St. Clair are 31.
|Flag||Name||ShortCode||Capital||Largest City||Statehood Date||Total Population||Area (Miles2/KM2)||Land Area (Miles/KM)||Water Area (Miles/KM)||House Seats||Total Counties||Total Cities||Total Zipcodes|
|Illinois||IL||Springfield||Chicago||December 3, 1818||12882135||57914 (149997)||55519 (143794)||2395 (6203)||18||105||1315||1645|