Residential delivery area · Kansas
ZIP Code 66531: Riley, KS
ZIP code 66531 uses the postal name Riley, Kansas and lies entirely in Riley County (Census 2020 ZIP-county file). About 1,300 people live there (Census Bureau, ACS 2020-2024). Median household income is $79,063 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Riley (1%) and Bala (1%); 97% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2024
- ZBP2023
- IRS2022
- Town
- Riley · its only residential ZIP
- County
- Riley County
- Census places
- Riley (1%); Bala (1%) census-designated place
- Metro area
- Manhattan, KS
- House district
- KS-1 119th Congress
- State
- Kansas
- Time zone
- Central
- Land area
- 35.2 sq mi · 36 people per sq mi
Where is ZIP code 66531?
66531 centers on 39.312°, -96.838° and covers 35.2 square miles of land plus 0.0 of water. It borders 3 ZIP codes: 66449, 66503, 67432.
The map draws ZIP code areas only. For the streets inside 66531, 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 66531 compare with the rest of Riley County?
| Measure | 66531 | In Riley County | In KS |
|---|---|---|---|
| People (ACS 2020-2024) | 1,256 | 7th of 13 | 305th of 704 |
| Median household income | $79k | 2nd of 6 | 95th of 286 |
| Median home value | $188k | 3rd of 5 | 125th of 282 |
Its median household income is higher than in 61% of U.S. residential ZIP codes, and it is denser than 36% 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 66531?
The 2020 Census counted 1,359 people in 66531; the ACS, which samples households over 2020-2024, estimates 1,256. Between the 2010 and 2020 censuses its population fell 1.5% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 1,256±286 (90% margin)
- 2020 Census count
- 1,359−1.5% since 2010 (1,380)
- Households
- 500
- Median age
- 39.9
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 66531?
Of the 1,256 people the ACS estimates in 66531, 25.5% are under 18 and 21.7% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (91.6%).
- Under 1825.5%
- 18 to 6452.9%
- 65 and older21.7%
- White, not Hispanic91.6%
- Other or two or more5.3%
- Hispanic or Latino3.1%
- Black, not Hispanic0.0%
- 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 66531 earn?
Median household income is $79,063 (ACS 2020-2024), the 2nd highest of the 6 ranked ZIP codes in Riley County. It is not measurably different from 2015-2019 ($78,001 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $79,063±$12,692
- Income per person
- $37,316
- Below the poverty line
- 3.7%
- Unemployed (of the labor force)
- 2.0%
- Adults 25+ with a bachelor's degree
- 31.4%
- Adjusted gross income per tax return, 2022
- $70,481640 returns; wages 68% 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 66531?
- Median home value (owners' estimate)
- $188,000
- Median gross rent
- $1,203
- Homes owned by their occupants
- 93.0%
- Housing units
- 591
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 66531?
31 business establishments had a location in this ZIP code in 2023, 2 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction10
- Administrative and support and waste management and remediation services5
- Other services (except public administration)5
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 66531?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 66449 | Leonardville | 937 | $90k | 5.5 mi |
| 66503 | Manhattan | 17,273 | $98k | 8.3 mi |
| 67432 | Clay Center | 5,607 | $70k | 18.4 mi |
| 66554 | Randolph | 770 | $97k | 12.9 mi (near) |
| 66514 | Milford | 1,350 | $94k | 13.0 mi (near) |
| 67447 | Green | 207 | $65k | 13.2 mi (near) |
| 66520 | Olsburg | 635 | $95k | 13.9 mi (near) |
| 66442 | Fort Riley | 16,890 | $52k | 15.5 mi (near) |
| 67487 | Wakefield | 1,515 | $68k | 15.5 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.