Arnold, Missouri
Arnold: city in Missouri
About
Arnold is a city located in the county of Jefferson in the U.S. state of Missouri. Its population at the 2010 census was 20,808 and a population density of 673 people per km². After 10 years in 2020 city had an estimated population of 21,145 inhabitants.
Quick Facts about Arnold
| Population | 21,145 (2020) |
| Country | United States of America |
| State | Missouri (United States) |
| County | Jefferson County |
| Postal code | 63010 |
| Phone Area Codes | 636 |
| Area | 30.93 km2 |
| Latitude & Longitude | 38.4328,-90.3776 |
| Altitude | 604 feet / 184 meters |
| Time Zone | Central Time Zone |
| Local time | 01:31:25 (23rd April 2026) |
| Density | 684 Pop. per km² as of 2020 |
| Population growth | 1.59% (2010-2020) |
| Weather | 81℉ Mostly Sunny 7-days weather |
Geography
Arnold is located at 38°25'58"N 90°22'39"W (38.4328300, -90.3776200).
Arnold map
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Official website of Arnold
Official WebsiteDemographics
The population of Arnold increased by 1.59% in 10 years.
| Year | Population | % Change | Method |
|---|---|---|---|
| 2010 | 20,808 | - | census |
| 2011 | 20,892 | 0.4% | estimation process |
| 2012 | 20,980 | 0.42% | estimation process |
| 2013 | 21,025 | 0.21% | estimation process |
| 2014 | 21,130 | 0.5% | estimation process |
| 2015 | 21,200 | 0.33% | estimation process |
| 2016 | 21,163 | -0.17% | estimation process |
| 2017 | 21,151 | -0.06% | estimation process |
| 2018 | 21,123 | -0.13% | estimation process |
| 2019 | 21,091 | -0.15% | estimation process |
| 2020 | 21,145 | 0.26% | estimation process |
People born in Arnold (2)
People born in Arnold, including United States admiral Kathleen L. Martin, football player Mike Wells, .
More notable people
Nearby Schools and Colleges
Schools and campuses linked to Arnold, MO. Select a name to open its map and contact details.
| Code | Name | City | ZIP |
|---|---|---|---|
| 460932 | Skin Institute | Saint Louis (MO) | 63126 |
Nearby Transit Stations (8)
Rail and bus stations connected to Arnold, MO. Select a station to open its map and address details.
| Code | Name | Address | Type |
|---|---|---|---|
| KWD | Kirkwood | 110 West Argonne Dr. | RAIL |
| STL | Gateway Transportation Center | 551 South 16th St. | RAIL |
| ALN | Alton | 3400 College Ave. | RAIL |
| WAH | Washington | 301 West Front St. | RAIL |
| HEM | Hermann | Wharf & Gutenberg Sts. | RAIL |
Closest post offices linked to Arnold.
| Post Office Name | City | ZIP |
|---|---|---|
| Arnold Post Office | Arnold (MO) | 63010 |
Other places with the same name (2)
- Arnold, Pennsylvania city of Pennsylvania with a population of 4,790 people.
- Arnold, Nebraska village in Nebraska with a population of 558 people.
Other cities in Jefferson County
Cities, towns, neighborhoods & other populated places in Jefferson County , MO.
| City Name | Population | Title |
|---|---|---|
| Festus | 12,114 | City in Missouri |
| De Soto | 6,340 | City in Jefferson County, Missouri |
| Pevely | 6,001 | City in Jefferson County, Missouri, United States |
| Barnhart | 5,682 | Census designated place |
| Crystal City | 4,700 | City in Jefferson County, Missouri, United States |
| High Ridge | 4,305 | Census designated place |
| Herculaneum | 4,261 | Roman town |
| Riverside | 3,528 | City in Platte County, Missouri, United States |
| Hillsboro | 3,355 | City in Missouri, United States |
| Byrnes Mill | 3,015 | City in Jefferson County, Missouri, United States |
| Olympian Village | 752 | City in Jefferson County, Missouri, United States |
| Cedar Hill Lakes | 227 | Village in Jefferson County, Missouri, United States |
| Scotsdale | 216 | Human settlement in Jefferson County, Missouri, United States of America |
| Parkdale | 162 | Human settlement in Jefferson County, Missouri, United States of America |
| Kimmswick | 140 | City in Jefferson County, Missouri, United States |
Distance to Other Cities
Arnold distances to largest Missouri cities