![]() Photo from Digital-Topo-Maps.com | Mason, IL 62443 Post Office Location: 755 Adams Street; Mason, IL Year Post Office built: Town(s) Served: Mason Acceptable City Names: Mason Not Acceptable City Names: Gilmore Sectional Service Facility: Effingham County(ies): Clay, Effingham Info on Mason: The Village of Mason is located along Illinois 37, and the Canadian National Railroad. This is located in Southwestern Effingham County. Mason was named after former Mayor Roswell Mason of the City of Chicago. He built the Central Illinois Railroad. |
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