Ottawa, IL Post Offices

Ottawa, Illinois has a population of 18,097. According to the 2021 census, the city's 2 post offices serve 7,893 households with a median income of 7,893. The city is located in LaSalle County and has a land area of 37,962,714 and a water area of 2,225,899.

Post Office
Address
Phone
Hours
Ottawa, IL Post Office 405 W Main St, Ottawa, Illinois, IL, 61350-2837
815-433-2021
Today Closed

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