There are 2 Post Offices in Collinsville, Illinois, serving a population of 24,767 people in an area of 15 square miles. There is 1 Post Office per 12,383 people, and 1 Post Office per 7 square miles.
In Illinois, Collinsville is ranked 1,015th of 1547 cities in Post Offices per capita, and 1,048th of 1547 cities in Post Offices per square mile.
Find addresses, phone numbers, fax numbers, hours & services for Collinsville Post Offices.
US Post Office 800 Belt Line Road Collinsville, IL Mailing Service, Postal Services
United States Postal Service 1610 Eastport Plaza Drive Collinsville, IL Mailing Service, Postal Services