Residential delivery area · New Hampshire
ZIP Code 03242: Henniker, NH
ZIP code 03242 uses the postal name Henniker, New Hampshire and lies entirely in Merrimack County (Census 2020 ZIP-county file). About 6,200 people live there (Census Bureau, ACS 2020-2024). Median household income is $95,206 (Census Bureau, ACS 2020-2024). By Census place, 3% of its land lies in Henniker (a census-designated place); 97% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Henniker · its only residential ZIP
- County
- Merrimack County
- Census places
- Henniker census-designated place
- Micro area
- Concord, NH
- House district
- NH-2 119th Congress
- State
- New Hampshire
- Time zone
- Eastern
- Land area
- 44.1 sq mi · 140 people per sq mi
Where is ZIP code 03242?
03242 centers on 43.169°, -71.831° and covers 44.1 square miles of land plus 0.7 of water. It borders 5 ZIP codes: 03244, 03229, 03221, 03281, 03278.
The map draws ZIP code areas only. For the streets inside 03242, 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 03242 compare with the rest of Merrimack County?
| Measure | 03242 | In Merrimack County | In NH |
|---|---|---|---|
| People (ACS 2020-2024) | 6,197 | 9th of 29 | 65th of 247 |
| Median household income | $95k | 13th of 21 | 91st of 158 |
| Median home value | $357k | 15th of 24 | 113th of 191 |
Its median household income is higher than in 78% of U.S. residential ZIP codes, and it is denser than 58% 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 03242?
The 2020 Census counted 6,185 people in 03242; the ACS, which samples households over 2020-2024, estimates 6,197. Between the 2010 and 2020 censuses its population grew 27.9% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 6,197
- 2020 Census count
- 6,185+27.9% since 2010 (4,836)
- Households
- 2,121
- Median age
- 31.1
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 03242?
Of the 6,197 people the ACS estimates in 03242, 15.3% are under 18 and 16.5% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (91.5%).
- Under 1815.3%
- 18 to 6468.2%
- 65 and older16.5%
- White, not Hispanic91.5%
- Hispanic or Latino5.0%
- Other or two or more2.7%
- Black, not Hispanic0.8%
- 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 03242 earn?
Median household income is $95,206 (ACS 2020-2024), the 13th highest of the 21 ranked ZIP codes in Merrimack County. It is not measurably different from 2015-2019 ($97,996 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $95,206±$20,525
- Income per person
- $43,367
- Below the poverty line
- 11.6%
- Unemployed (of the labor force)
- 1.2%
- Adults 25+ with a bachelor's degree
- 41.4%
- Adjusted gross income per tax return, 2022
- $96,7072,170 returns; wages 67% 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 03242?
FHFA's house price index for 03242, built from repeat sales and appraisals of the same homes, rose 104% from 2015 to 2025 and rose 64% from 2020 to 2025, and moved +0.1% in 2025.
- Median home value (owners' estimate)
- $356,700
- Median gross rent
- $1,081
- Homes owned by their occupants
- 64.5%
- Housing units
- 2,305
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 03242?
134 business establishments had a location in this ZIP code in 2023, the same count as in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction23
- Retail trade18
- Accommodation and food services18
- Professional, scientific, and technical services14
- Other services (except public administration)12
- Manufacturing10
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 03242?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 03244 | Hillsborough | 8,156 | $86k | 5.7 mi |
| 03229 | Contoocook | 6,046 | $137k | 7.1 mi |
| 03221 | Bradford | 2,200 | $110k | 8.9 mi |
| 03281 | Weare | 9,170 | $118k | 9.0 mi |
| 03278 | Warner | 3,079 | $95k | 9.6 mi |
| 03273 | South Sutton | 361 | $188k | 10.4 mi (near) |
| 03440 | Antrim | 2,661 | $89k | 10.4 mi (near) |
| 03442 | Bennington | 1,588 | $84k | 10.9 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.