ZIP Code 37640

ZIP code 37640 is classified by USPS as a standard delivery area and covers roughly 273.2 square miles in Butler, Johnson County, Tennessee. The area is home to 3,743 residents, producing a population density of 14 people per square mile, and falls within the New York time zone. These USPS and Census boundary values drive every downstream statistic on this page, including the benchmarks that compare 37640 against Tennessee and the nation.

On the economic side, the median household income for ZIP 37640 sits at $55,402 (17% below the Tennessee average), while per-capita income is $36,615. The poverty rate stands at 21.1% and the unemployment rate at 3.6%. On housing, the median home value is $174,000 (30% below the state average) with median rent at $687 per month, and 85.8% of occupied units are owner-occupied, a direct signal of whether 37640 behaves more like a homeowner neighborhood or a renter-heavy ZIP.

Education and household profile round out the picture: 20.9% of adults hold a bachelor's degree or higher, the median age is 53.4, and the average commute is 34 minutes. We also surface 3 nearby ZIP codes within roughly 10 miles and 4 additional ZIPs sharing Johnson County, so you can benchmark 37640 against its immediate geography rather than a national average alone. Every figure is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates, HUD Fair Market Rents, and FHFA Home Price Index data, no estimates, no proprietary scoring. Verify with HUD →