Residential delivery area · Connecticut
ZIP Code 06231: Amston, CT
ZIP code 06231 uses the postal name Amston, Connecticut and lies entirely in Tolland County (Census 2020 ZIP-county file). About 3,600 people live there (Census Bureau, ACS 2020-2024). Median household income is $168,313 (Census Bureau, ACS 2020-2024). Its land lies outside any incorporated or census-designated place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Amston · its only residential ZIP
- County
- Tolland County
- House district
- CT-2 119th Congress
- State
- Connecticut
- Time zone
- Eastern
- Land area
- 15.7 sq mi · 233 people per sq mi
Where is ZIP code 06231?
06231 centers on 41.633°, -72.367° and covers 15.7 square miles of land plus 0.2 of water. It borders 5 ZIP codes: 06248, 06447, 06237, 06415, 06249.
The map draws ZIP code areas only. For the streets inside 06231, 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 06231 compare with the rest of Tolland County?
| Measure | 06231 | In Tolland County | In CT |
|---|---|---|---|
| People (ACS 2020-2024) | 3,648 | 15th of 18 | 201st of 288 |
| Median household income | $168k | 1st of 15 | 23rd of 228 |
| Median home value | $408k | 1st of 16 | 86th of 245 |
Its median household income is higher than in 98% of U.S. residential ZIP codes, and it is denser than 64% 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 06231?
The 2020 Census counted 3,901 people in 06231; the ACS, which samples households over 2020-2024, estimates 3,648. Between the 2010 and 2020 censuses its population fell 4.5% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 3,648±400 (90% margin)
- 2020 Census count
- 3,901−4.5% since 2010 (4,083)
- Households
- 1,295
- Median age
- 44.5
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 06231?
Of the 3,648 people the ACS estimates in 06231, 19.4% are under 18 and 18.4% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (84.1%).
- Under 1819.4%
- 18 to 6462.2%
- 65 and older18.4%
- White, not Hispanic84.1%
- Hispanic or Latino7.5%
- Other or two or more7.3%
- Asian, not Hispanic0.6%
- Black, not Hispanic0.5%
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 06231 earn?
Median household income is $168,313 (ACS 2020-2024), the highest of the 15 ranked ZIP codes in Tolland County. It is not measurably different from 2015-2019 ($153,901 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $168,313±$21,039
- Income per person
- $71,798
- Below the poverty line
- 5.3%
- Unemployed (of the labor force)
- 4.9%
- Adults 25+ with a bachelor's degree
- 59.2%
- Adjusted gross income per tax return, 2022
- $114,1012,000 returns; wages 74% 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 06231?
FHFA's house price index for 06231, built from repeat sales and appraisals of the same homes, rose 73% from 2015 to 2025 and rose 65% from 2020 to 2025, and moved +10.4% in 2025.
- Median home value (owners' estimate)
- $407,500
- Median gross rent
- $1,378
- Homes owned by their occupants
- 91.0%
- Housing units
- 1,444
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 06231?
32 business establishments had a location in this ZIP code in 2023, 2 more than in 2018; the most are in professional, scientific, and technical services (ZIP Code Business Patterns).
- Professional, scientific, and technical services8
- Health care and social assistance5
- Construction4
- Other services (except public administration)4
- Administrative and support and waste management and remediation services3
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 06231?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 06248 | Hebron | 5,509 | $134k | 4.4 mi |
| 06447 | Marlborough | 6,130 | $142k | 4.5 mi |
| 06237 | Columbia | 5,300 | $127k | 5.3 mi |
| 06415 | Colchester | 16,038 | $123k | 5.8 mi |
| 06249 | Lebanon | 7,116 | $109k | 6.6 mi |
| 06232 | Andover | 3,152 | $135k | 6.9 mi (near) |
| 06424 | East Hampton | 12,751 | $124k | 8.6 mi (near) |
| 06336 | Gilman | 44 | $134k | 9.6 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.