There are 2 Post Offices in Flat Rock, Illinois, serving a population of 278 people in an area of 1 square miles. There is 1 Post Office per 139 people, and 1 Post Office per square mile.
In Illinois, Flat Rock is ranked 181st of 1547 cities in Post Offices per capita, and 304th of 1547 cities in Post Offices per square mile.
Find addresses, phone numbers, fax numbers, hours & services for Flat Rock Post Offices.
US Post Office 201 West 2nd Street Flat Rock, IL
United States Postal Service 201 West 2nd Street Flat Rock, IL Mailing Service, Postal Services