Arnold is a city in Missouri with about 20,884 residents. Arnold sits in Jefferson County. The median age is 39.9 and the median household income is $75,194. Homes carry a median value of $209,700, and about 80% of residents own where they live. White residents make up the largest share of the population (90%). Around 24% of adults hold a bachelor's degree or higher, and the typical commute runs about 28 minutes.
Source: U.S. Census Bureau, American Community Survey (5-year).
Source: Dru Sjodin National Sex Offender Public Website (NSOPW) and state registries. Public record. This information is provided for public awareness. Using it to harass, threaten, or discriminate against any registrant, or for any purpose prohibited by law, is illegal. Verify against the official registry record before relying on it.
Common questions
Arnold — frequently asked
What is the population of Arnold, Missouri?
Arnold has a population of about 20,884, according to the U.S. Census Bureau's American Community Survey (5-year).
What is the average home value in Arnold?
The median home value in Arnold is $209,700, and the median gross rent is $1,085/month (U.S. Census ACS).
Is Arnold safe? What is the crime rate?
Arnold Police Department reported a violent-crime rate of about 120 per 100,000 residents in 2023 — lower than the U.S. rate of 386. Source: FBI UCR/NIBRS.
What natural-disaster risks does Arnold face?
FEMA's National Risk Index rates Jefferson County as "Relatively Moderate" overall, with top hazards including strong wind, lightning, tornado.
How many schools are in Arnold?
Arnold has 10 public schools (6 elementary, 2 middle, 1 high). Source: U.S. Dept. of Education, NCES.
How many registered sex offenders are in Arnold?
Public registry data lists 3 registered sex offenders in or near Arnold. This is neighborhood-safety information from the public state registry.