Residential delivery area · Connecticut
ZIP Code 06415: Colchester, CT
ZIP code 06415 uses the postal name Colchester, Connecticut and lies mostly in New London County (95% of its residents) with the rest in Middlesex County (Census 2020 ZIP-county file). About 16,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $123,256 (Census Bureau, ACS 2020-2024). By Census place, 8% of its land lies in Colchester (a census-designated place); 92% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Colchester · its only residential ZIP
- County
- New London County (95%); Middlesex County (5%)
- Census places
- Colchester census-designated place
- House district
- CT-2 119th Congress
- State
- Connecticut
- Time zone
- Eastern
- Land area
- 56.0 sq mi · 287 people per sq mi
Where is ZIP code 06415?
06415 centers on 41.550°, -72.349° and covers 56.0 square miles of land plus 1.1 of water. It borders 7 ZIP codes: 06231, 06469, 06420, 06423, 06249, 06424, 06447.
The map draws ZIP code areas only. For the streets inside 06415, 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 06415 compare with the rest of New London County?
| Measure | 06415 | In New London County | In CT |
|---|---|---|---|
| People (ACS 2020-2024) | 16,038 | 4th of 33 | 86th of 288 |
| Median household income | $123k | 7th of 26 | 76th of 228 |
| Median home value | $366k | 9th of 26 | 123rd of 245 |
Its median household income is higher than in 91% of U.S. residential ZIP codes, and it is denser than 67% 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 06415?
The 2020 Census counted 16,300 people in 06415; the ACS, which samples households over 2020-2024, estimates 16,038. Between the 2010 and 2020 censuses its population fell 3.3% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 16,038
- 2020 Census count
- 16,300−3.3% since 2010 (16,857)
- Households
- 6,604
- Median age
- 44.3
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 06415?
Of the 16,038 people the ACS estimates in 06415, 20.3% are under 18 and 20.9% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (88.7%).
- Under 1820.3%
- 18 to 6458.8%
- 65 and older20.9%
- White, not Hispanic88.7%
- Hispanic or Latino4.3%
- Other or two or more3.3%
- Black, not Hispanic2.6%
- Asian, not Hispanic1.1%
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 06415 earn?
Median household income is $123,256 (ACS 2020-2024), the 7th highest of the 26 ranked ZIP codes in New London County. It is not measurably different from 2015-2019 ($128,666 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $123,256±$13,017
- Income per person
- $60,848
- Below the poverty line
- 3.8%
- Unemployed (of the labor force)
- 1.7%
- Adults 25+ with a bachelor's degree
- 49.8%
- Adjusted gross income per tax return, 2022
- $97,2158,520 returns; wages 73% 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 06415?
FHFA's house price index for 06415, built from repeat sales and appraisals of the same homes, rose 75% from 2015 to 2025 and rose 60% from 2020 to 2025, and moved +8.9% in 2025.
- Median home value (owners' estimate)
- $366,300
- Median gross rent
- $1,474
- Homes owned by their occupants
- 77.3%
- Housing units
- 7,292
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 06415?
307 business establishments had a location in this ZIP code in 2023, 18 fewer than in 2018; the most are in health care and social assistance (ZIP Code Business Patterns).
- Health care and social assistance51
- Retail trade46
- Construction41
- Other services (except public administration)36
- Accommodation and food services31
- Administrative and support and waste management and remediation services18
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 06415?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 06231 | Amston | 3,648 | $168k | 5.8 mi |
| 06469 | Moodus | 3,311 | $105k | 6.0 mi |
| 06420 | Salem | 4,368 | $123k | 6.3 mi |
| 06423 | East Haddam | 5,182 | $108k | 6.8 mi |
| 06249 | Lebanon | 7,116 | $109k | 8.0 mi |
| 06424 | East Hampton | 12,751 | $124k | 8.0 mi |
| 06447 | Marlborough | 6,130 | $142k | 8.1 mi |
| 06336 | Gilman | 44 | $134k | 8.2 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.