The population count of Arnold, MO was 21,196 in 2016.

Population

Population Change

Above charts are based on data from the U.S. Census American Community Survey | ODN Dataset | API - Notes:

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Demographics and Population Datasets Involving Arnold, MO

  • API

    2016 Residential Sewer Rate Survey

    data.wa.gov | Last Updated 2017-11-27T22:51:13.000Z

    The survey includes monthly sewer rates per “equivalent residential unit” (ERU)* served by municipal wastewater treatment plants in Washington State. Information was compiled from August 2016-January 2017 using information from utility billing web pages and phone surveys. Stormwater rates were also included as available.