Residential delivery area · Missouri
ZIP Code 64840: Diamond, MO
ZIP code 64840 uses the postal name Diamond, Missouri and lies mostly in Newton County (87% of its land) with the rest in Jasper County (Census 2020 ZIP-county file). About 3,300 people live there (Census Bureau, ACS 2020-2024). Median household income is $65,000 (Census Bureau, ACS 2020-2024). By Census place, 1% of its land lies in Diamond; 99% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2024
- ZBP2023
- IRS2022
- Town
- Diamond · its only residential ZIP
- County
- Newton County (87%); Jasper County (13%)
- Census places
- Diamond
- Metro area
- Joplin, MO-KS
- House district
- MO-7 119th Congress
- State
- Missouri
- Time zone
- Central
- Land area
- 52.0 sq mi · 64 people per sq mi
Where is ZIP code 64840?
64840 centers on 37.020°, -94.343° and covers 52.0 square miles of land plus 0.1 of water. It borders 5 ZIP codes: 64804, 64844, 64850, 64836, 64862.
The map draws ZIP code areas only. For the streets inside 64840, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 64840 compare with the rest of Newton County?
| Measure | 64840 | In Newton County | In MO |
|---|---|---|---|
| People (ACS 2020-2024) | 3,325 | 5th of 14 | 351st of 1,035 |
| Median household income | $65k | 1st of 8 | 242nd of 479 |
| Median home value | $226k | 1st of 8 | 184th of 494 |
Its median household income is higher than in 38% of U.S. residential ZIP codes, and it is denser than 46% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 64840?
The 2020 Census counted 2,785 people in 64840; the ACS, which samples households over 2020-2024, estimates 3,325. Between the 2010 and 2020 censuses its population fell 1.0% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 3,325±585 (90% margin)
- 2020 Census count
- 2,785−1.0% since 2010 (2,813)
- Households
- 1,216
- Median age
- 41.8
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 64840?
Of the 3,325 people the ACS estimates in 64840, 24.9% are under 18 and 23.8% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (84.7%).
- Under 1824.9%
- 18 to 6451.2%
- 65 and older23.8%
- White, not Hispanic84.7%
- Hispanic or Latino8.7%
- Other or two or more6.2%
- Black, not Hispanic0.4%
- Asian, not Hispanic0.0%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 64840 earn?
Median household income is $65,000 (ACS 2020-2024), the highest of the 8 ranked ZIP codes in Newton County. It is not measurably different from 2015-2019 ($75,482 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $65,000±$9,155
- Income per person
- $31,132
- Below the poverty line
- 7.7%
- Unemployed (of the labor force)
- 4.4%
- Adults 25+ with a bachelor's degree
- 23.2%
- Adjusted gross income per tax return, 2022
- $59,5711,240 returns; wages 75% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 64840?
- Median home value (owners' estimate)
- $225,600
- Median gross rent
- $705
- Homes owned by their occupants
- 72.8%
- Housing units
- 1,332
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 64840?
45 business establishments had a location in this ZIP code in 2023, 3 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction10
- Other services (except public administration)8
- Retail trade7
- Transportation and warehousing7
- Wholesale trade4
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 64840?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 64804 | Joplin | 37,016 | $63k | 9.3 mi |
| 64844 | Granby | 4,796 | $63k | 9.5 mi |
| 64850 | Neosho | 25,126 | $64k | 11.5 mi |
| 64836 | Carthage | 26,562 | $61k | 12.2 mi |
| 64862 | Sarcoxie | 3,173 | $60k | 13.5 mi |
| 64841 | Duenweg | 1,381 | $59k | 5.5 mi (near) |
| 64835 | Carterville | 2,074 | $59k | 10.3 mi (near) |
| 64801 | Joplin | 36,287 | $53k | 10.4 mi (near) |
| 64858 | Racine | 586 | – | 13.2 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.