Post Offices in Algonquin, Illinois, United States SearchSearch SearchSearch View: Grid 1View: Grid 2View: Grid 3View: Grid 4View: Grid 5View: List Algonquin Post Office No Reviews Favorite Fax: (847) 658-4732Phone: (847) 658-0012Retail Hours Algonquin East Post Office No Reviews Favorite Phone: (847) 658-0012Retail Hours