Residential delivery area · New Hampshire
ZIP Code 03230: Danbury, NH
ZIP code 03230 uses the postal name Danbury, New Hampshire and lies entirely in Merrimack County (Census 2020 ZIP-county file). About 1,500 people live there (Census Bureau, ACS 2020-2024). Median household income is $71,685 (Census Bureau, ACS 2020-2024). Its land lies outside any incorporated or census-designated place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Danbury · its only residential ZIP
- County
- Merrimack County
- Micro area
- Concord, NH
- House district
- NH-2 119th Congress
- State
- New Hampshire
- Time zone
- Eastern
- Land area
- 40.3 sq mi · 36 people per sq mi
Where is ZIP code 03230?
03230 centers on 43.528°, -71.864° and covers 40.3 square miles of land plus 0.3 of water. It borders 5 ZIP codes: 03243, 03240, 03216, 03287, 03222.
The map draws ZIP code areas only. For the streets inside 03230, 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 03230 compare with the rest of Merrimack County?
| Measure | 03230 | In Merrimack County | In NH |
|---|---|---|---|
| People (ACS 2020-2024) | 1,451 | 24th of 29 | 172nd of 247 |
| Median household income | $72k | 21st of 21 | 138th of 158 |
| Median home value | $241k | 24th of 24 | 178th of 191 |
Its median household income is higher than in 50% of U.S. residential ZIP codes, and it is denser than 36% 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 03230?
The 2020 Census counted 1,256 people in 03230; the ACS, which samples households over 2020-2024, estimates 1,451. Between the 2010 and 2020 censuses its population grew 2.0% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 1,451±264 (90% margin)
- 2020 Census count
- 1,256+2.0% since 2010 (1,231)
- Households
- 649
- Median age
- 47.4
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 03230?
Of the 1,451 people the ACS estimates in 03230, 17.2% are under 18 and 23.7% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (94.8%).
- Under 1817.2%
- 18 to 6459.1%
- 65 and older23.7%
- White, not Hispanic94.8%
- Other or two or more2.9%
- Hispanic or Latino2.0%
- Asian, not Hispanic0.3%
- Black, 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 03230 earn?
Median household income is $71,685 (ACS 2020-2024), the 21st highest of the 21 ranked ZIP codes in Merrimack County. It is not measurably different from 2015-2019 ($77,402 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $71,685±$11,163
- Income per person
- $38,399
- Below the poverty line
- 12.4%
- Unemployed (of the labor force)
- 5.7%
- Adults 25+ with a bachelor's degree
- 17.5%
- Adjusted gross income per tax return, 2022
- $66,001680 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 03230?
FHFA's house price index for 03230, built from repeat sales and appraisals of the same homes, rose 115% from 2020 to 2025, and moved +24.9% in 2025.
- Median home value (owners' estimate)
- $240,700
- Median gross rent
- $1,281
- Homes owned by their occupants
- 90.9%
- Housing units
- 773
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 03230?
24 business establishments had a location in this ZIP code in 2023, 2 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction12
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 03230?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 03243 | Hill | 952 | $83k | 4.8 mi |
| 03240 | Grafton | 1,354 | $82k | 5.4 mi |
| 03216 | Andover | 2,046 | $88k | 6.5 mi |
| 03287 | Wilmot | 1,487 | $118k | 6.5 mi |
| 03222 | Bristol | 6,097 | $82k | 8.6 mi |
| 03231 | East Andover | 89 | – | 7.7 mi (near) |
| 03233 | Elkins | 156 | $120k | 7.9 mi (near) |
| 03284 | Springfield | 890 | $113k | 8.4 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.