There are 2 Post Offices in South Wilmington, Illinois, serving a population of 831 people in an area of 1 square miles. There is 1 Post Office per 415 people, and 1 Post Office per square mile.
In Illinois, South Wilmington is ranked 387th of 1547 cities in Post Offices per capita, and 218th of 1547 cities in Post Offices per square mile.
Find addresses, phone numbers, fax numbers, hours & services for South Wilmington Post Offices.
US Post Office 280 Third Avenue South Wilmington, IL
United States Postal Service 280 3rd Avenue South Wilmington, IL Mailing Service, Postal Services