Diamond is a town in Newton County, Missouri, home to about 914 people across 0.8 square miles. Its ZIP code is 64840.
Homes sold for a median of $147 per square foot in the three months ending August 2026, a seller’s market.
Each card is that ZIP code’s whole market, including any part outside Diamond. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Diamond’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Tulsa International Airport (TUL)103 miles away |
|---|---|
| Closer regional airport | Joplin Regional Airport (JLN)14 miles away |
| Nearest city of 250,000+ | Tulsa, OK107 miles away |
| Nearest city of 1 million+ | Dallas, TX322 miles away |
Straight-line distances from the center of Diamond; 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.
Diamond had 831 residents in the 2020 census, up 3% since 2000.
It’s the 391st largest of 1,060 towns in Missouri by population.
Newton County grew from 27,001 residents in 1900 to 58,648 in 2020.
Newton County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 90°F in summer, and winter lows average 23°F. About 46.8 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Diamond 2w, MO weather station (2 miles away).
22,540 jobs at 1,251 businesses in Newton County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
2 doctors and other health care providers list an office in Diamond.
Nearest hospitals
Providers with an office here
| Chiropractors | 2 |
|---|
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Public schools here are run by Diamond R-IV. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Diamond Elem.Diamond | Pre-K–4 | 332 | Public | 1.1 mi |
| Diamond MiddleDiamond | 5–8 | 212 | Public | 1.1 mi |
| Diamond HighDiamond | 9–12 | 243 | Public | 1.2 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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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.