Residential delivery area · Connecticut
ZIP Code 06420: Salem, CT
ZIP code 06420 uses the postal name Salem, Connecticut and lies mostly in New London County (99% of its residents) with the rest in Middlesex County (Census 2020 ZIP-county file). About 4,400 people live there (Census Bureau, ACS 2020-2024). Median household income is $123,425 (Census Bureau, ACS 2020-2024). Its land lies outside any incorporated or census-designated place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Salem · its only residential ZIP
- County
- New London County (99%); Middlesex County (1%)
- House district
- CT-2 119th Congress
- State
- Connecticut
- Time zone
- Eastern
- Land area
- 29.6 sq mi · 148 people per sq mi
Where is ZIP code 06420?
06420 centers on 41.489°, -72.258° and covers 29.6 square miles of land plus 0.8 of water. It borders 6 ZIP codes: 06370, 06334, 06415, 06333, 06423, 06371.
The map draws ZIP code areas only. For the streets inside 06420, 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 06420 compare with the rest of New London County?
| Measure | 06420 | In New London County | In CT |
|---|---|---|---|
| People (ACS 2020-2024) | 4,368 | 20th of 33 | 194th of 288 |
| Median household income | $123k | 6th of 26 | 75th of 228 |
| Median home value | $406k | 6th of 26 | 89th of 245 |
Its median household income is higher than in 91% of U.S. residential ZIP codes, and it is denser than 59% 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 06420?
The 2020 Census counted 4,250 people in 06420; the ACS, which samples households over 2020-2024, estimates 4,368. Between the 2010 and 2020 censuses its population grew 1.6% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 4,368
- 2020 Census count
- 4,250+1.6% since 2010 (4,182)
- Households
- 1,811
- Median age
- 41.6
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 06420?
Of the 4,368 people the ACS estimates in 06420, 22.8% are under 18 and 20.2% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (86.2%).
- Under 1822.8%
- 18 to 6457.0%
- 65 and older20.2%
- White, not Hispanic86.2%
- Hispanic or Latino6.3%
- Other or two or more5.5%
- Asian, not Hispanic1.5%
- 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 06420 earn?
Median household income is $123,425 (ACS 2020-2024), the 6th highest of the 26 ranked ZIP codes in New London County. It is not measurably different from 2015-2019 ($134,935 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $123,425
- Income per person
- $61,743
- Below the poverty line
- 6.1%
- Unemployed (of the labor force)
- 3.1%
- Adults 25+ with a bachelor's degree
- 50.5%
- Adjusted gross income per tax return, 2022
- $108,8912,200 returns; wages 72% 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 06420?
FHFA's house price index for 06420, built from repeat sales and appraisals of the same homes, rose 85% from 2015 to 2025 and rose 63% from 2020 to 2025, and moved +2.2% in 2025.
- Median home value (owners' estimate)
- $405,800
- Median gross rent
- $1,440
- Homes owned by their occupants
- 86.4%
- Housing units
- 1,811
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 06420?
73 business establishments had a location in this ZIP code in 2023, 2 fewer than in 2018; the most are in retail trade (ZIP Code Business Patterns).
- Retail trade10
- Construction9
- Professional, scientific, and technical services9
- Accommodation and food services8
- Health care and social assistance7
- Other services (except public administration)7
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 06420?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 06370 | Oakdale | 7,327 | $106k | 3.9 mi |
| 06334 | Bozrah | 2,249 | $108k | 5.8 mi |
| 06415 | Colchester | 16,038 | $123k | 6.3 mi |
| 06333 | East Lyme | 7,389 | $129k | 7.3 mi |
| 06423 | East Haddam | 5,182 | $108k | 7.2 mi |
| 06371 | Old Lyme | 9,828 | $132k | 9.4 mi |
| 06353 | Montville | 439 | – | 6.6 mi (near) |
| 06336 | Gilman | 44 | $134k | 7.1 mi (near) |
| 06382 | Uncasville | 10,143 | $90k | 7.2 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.