Knoxville is a town in Johnson County, Arkansas, home to about 663 people across 3.2 square miles. Its ZIP code is 72845.
Homes sold for a median of $124 per square foot in the three months ending August 2026, a balanced market.
Each card is that ZIP code’s whole market, including any part outside Knoxville. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
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| Nearest major airport | Tulsa International Airport (TUL)152 miles away |
|---|---|
| Closer regional airport | Fort Smith Regional Airport (FSM)57 miles away |
| Nearest city of 250,000+ | Tulsa, OK152 miles away |
| Nearest city of 1 million+ | Dallas, TX264 miles away |
Straight-line distances from the center of Knoxville; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Knoxville had 660 residents in the 2020 census, up 29% since 2000.
It’s the 265th largest of 615 towns in Arkansas by population.
Johnson County grew from 17,448 residents in 1900 to 25,749 in 2020.
Johnson County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 92°F in summer, and winter lows average 29°F. About 51.1 inches of rain and melted snow fall in a typical year, with about 3 inches of snow.
Source: NOAA 1991–2020 climate normals, Clarksville 2n, AR weather station (11 miles away).
7,877 jobs at 413 businesses in Johnson County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
Nearest hospitals
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances.
Parks (1 nearby)
Counts are within about 1.5 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
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Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.