Arnold, Missouri Map and Directory
The Census Bureau estimates that Arnold had about 21,113 residents in 2017, which is approximately 1,823 people per square mile of land area.
According to recent American Community Survey data, Arnold had 8,204 total estimated households and the median household income was about $56,329 per year.
The Missouri counties map at upper right shows Jefferson County, highlighted in red. Use the menu below to display interactive maps of Arnold, either in a frame on this page or in full-screen mode.
Use the menu below to display categorized Arnold directories.
Nearby Missouri Cities and Towns *
* Parenthesized numbers indicate economic activity levels.
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