Residential delivery area · Connecticut
ZIP Code 06438: Haddam, CT
ZIP code 06438 uses the postal name Haddam, Connecticut and lies entirely in Middlesex County (Census 2020 ZIP-county file). About 2,900 people live there (Census Bureau, ACS 2020-2024). Median household income is $121,429 (Census Bureau, ACS 2020-2024). By Census place, 8% of its land lies in Higganum (a census-designated place); 92% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Haddam · its only residential ZIP
- County
- Middlesex County
- Census places
- Higganum census-designated place
- House district
- CT-2 119th Congress
- State
- Connecticut
- Time zone
- Eastern
- Land area
- 14.0 sq mi · 207 people per sq mi
Where is ZIP code 06438?
06438 centers on 41.451°, -72.510° and covers 14.0 square miles of land plus 0.9 of water. It borders 4 ZIP codes: 06412, 06441, 06423, 06424.
The map draws ZIP code areas only. For the streets inside 06438, 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 06438 compare with the rest of Middlesex County?
| Measure | 06438 | In Middlesex County | In CT |
|---|---|---|---|
| People (ACS 2020-2024) | 2,887 | 18th of 25 | 216th of 288 |
| Median household income | $121k | 7th of 18 | 81st of 228 |
| Median home value | $363k | 14th of 21 | 128th of 245 |
Its median household income is higher than in 91% of U.S. residential ZIP codes, and it is denser than 63% 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 06438?
The 2020 Census counted 2,616 people in 06438; the ACS, which samples households over 2020-2024, estimates 2,887. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 2,887±422 (90% margin)
- 2020 Census count
- 2,616
- Households
- 1,036
- Median age
- 46.2
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 06438?
Of the 2,887 people the ACS estimates in 06438, 20.4% are under 18 and 24.2% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (84.9%).
- Under 1820.4%
- 18 to 6455.4%
- 65 and older24.2%
- White, not Hispanic84.9%
- Other or two or more9.9%
- Hispanic or Latino3.7%
- Asian, not Hispanic1.1%
- 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 06438 earn?
Median household income is $121,429 (ACS 2020-2024), the 7th highest of the 18 ranked ZIP codes in Middlesex County.
- Median household income
- $121,429±$18,624
- Income per person
- $54,727
- Below the poverty line
- 3.3%
- Unemployed (of the labor force)
- 5.9%
- Adults 25+ with a bachelor's degree
- 53.8%
- Adjusted gross income per tax return, 2022
- $127,3091,400 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 06438?
FHFA's house price index for 06438, built from repeat sales and appraisals of the same homes, rose 63% from 2015 to 2025 and rose 58% from 2020 to 2025, and moved +12.1% in 2025.
- Median home value (owners' estimate)
- $362,500
- Median gross rent
- $1,662
- Homes owned by their occupants
- 81.1%
- Housing units
- 1,160
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 06438?
58 business establishments had a location in this ZIP code in 2023, 1 fewer than in 2018; the most are in retail trade (ZIP Code Business Patterns).
- Retail trade11
- Other services (except public administration)8
- Accommodation and food services7
- Professional, scientific, and technical services6
- Administrative and support and waste management and remediation services6
- Construction5
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 06438?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 06412 | Chester | 3,825 | $109k | 2.9 mi |
| 06441 | Higganum | 5,348 | $111k | 3.9 mi |
| 06423 | East Haddam | 5,182 | $108k | 6.2 mi |
| 06424 | East Hampton | 12,751 | $124k | 7.6 mi |
| 06469 | Moodus | 3,311 | $105k | 5.0 mi (near) |
| 06417 | Deep River | 4,458 | $90k | 6.0 mi (near) |
| 06439 | Hadlyme | 65 | $187k | 6.2 mi (near) |
| 06419 | Killingworth | 6,240 | $141k | 6.4 mi (near) |
| 06456 | Middle Haddam | 281 | $129k | 6.5 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.