Alexander County Post Offices

1500 Washington Ave
Cairo, Illinois 62914

37914 Grapevine Trl
Mc Clure, Illinois 62957

22475 Railroad St
Olive Branch, Illinois 62969

250 Front St
Tamms, Illinois 62988

815 Poplar St
Thebes, Illinois 62990

Alexander County

There are 5 US Post Offices in Alexander County serving a total of 8,093 residents equating to 1,619 residents per post office. It's estimated that approximately 12,917 packages are handled across the 5 county post offices annually. Alexander County is the southernmost county of the U.S. state of Illinois. As of the 2010 census, the population was 8,238. Its county seat is Cairo. Alexander County is part of the Cape Girardeau, MO-IL Metropolitan Statistical Area."