Median Age
42 Years
Largest Age Group
60-69 Years
Approximately 14% of Residents
Under 20
22%
Over 65
21%
Area Guide
Avg Rent
$1,019
Population
20,501
Renter Mix
23% Rent
Nestled alongside the Mississippi and Meramec Rivers, Arnold lies just 18 miles south of Saint Louis. Arnold may be proximate to the big city, but it feels worlds away with its pervasive natural beauty that includes rolling hills, lush trees, and enchanting waterways.
Naturally, Arnold offers plenty of options for outdoor recreation. Nine city parks tout more than 400 acres of green space for activities like walking, picnicking, fishing, boating, playing sports, and more. Some of Arnold’s top recreational destinations include Arnold City Park, Arnold Recreation Center, and Arnold Golf Club (formerly known as Pomme Creek Golf Course).
The city also boasts two dog parks, a seasonal farmers market, and numerous modern shopping centers equipped with national retailers and chain restaurants. Arnold is just minutes away from area attractions such as Mastodon State Historic Site, Cliff Cave County Park, and Suson Park. Getting around from Arnold is a breeze with convenience to I-55 and U.S. 61.
Strawberry Creek Nature Preserve has 118 acres of forested trails that visitors can explore.
The Arnold branch library is located close to downtown Arnold.
Arnold residents can pick up groceries at Dierbergs.
Bi-levels are common in Arnold.
Some homes in Arnold feature symmetrical facades.
Newer constructions in Arnold include modern amenities.
Median Household Income
$63,687
Average: $80,644
Education
4,346
Residents Have a Degree
Job Market
10,466
Workers Employed
Median Age
42 Years
Largest Age Group
60-69 Years
Approximately 14% of Residents
Under 20
22%
Over 65
21%
Housing Distribution
Arnold has more homeowners than renters.
Education Distribution
Review this city's overall education levels.
As of June 2026, the average apartment rent in Arnold, MO is $1,019 for one bedroom, $1,211 for two bedrooms, and $1,300 for three bedrooms. Apartment rent in Arnold has increased by 5.4% in the past year.
Explore how walkable, bikeable, drivable, and transit-friendly Arnold, MO is for everyday living.
Fairly Walkable
Walkability
Exceptionally Drivable
Drivability
Somewhat Bikeable
Bikeability
Public
Grades K-5
425 Students
Meramec Heights Elementary School
Public
Grades K-5
425 Students
Public
Grades K-5
351 Students
Public
Grades K-5
351 Students
Public
Grades K-5
380 Students
Public
Grades 6-8
616 Students
Public
Grades 6-8
616 Students
Public
Grades 6-8
632 Students
Public
Grades 6-8
632 Students
Public
Grades 9-12
1,742 Students
Public
Grades 9-12
1,742 Students
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© 2026. All rights reserved.
† Our analysis of utilities, groceries, transportation, healthcare, home prices, and other goods and services is sourced from the Cost of Living Index, a respected benchmark published by the Council for Community and Economic Research (C2ER) that provides a thorough overview of living expenses across different regions.
Rent data is provided by CoStar Group’s Market Trend reports. As the industry leader in commercial real estate information, analytics, and news, CoStar conducts extensive research to produce and maintain a comprehensive database of commercial real estate information. We combine this data with public record to provide the most up-to-date rental information available.
Consumer goods, services, and home prices are sourced from the Cost of Living Index published by the Council for Community and Economic Research (C2ER). The data on this page is updated quarterly. It was last published in June 2026.
Demographic information comes from Neustar and combines detailed address data with U.S. Census and American Community Survey statistics to produce reliable local estimates.