Residential delivery area · New Hampshire
ZIP Code 03823: Madbury, NH
ZIP code 03823 uses the postal name Madbury, New Hampshire and lies entirely in Strafford County (Census 2020 ZIP-county file). About 2,200 people live there (Census Bureau, ACS 2020-2024). Median household income is $148,365 (Census Bureau, ACS 2020-2024). Its land lies outside any incorporated or census-designated place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Madbury · its only residential ZIP
- County
- Strafford County
- Metro area
- Boston-Cambridge-Newton, MA-NH
- House district
- NH-1 119th Congress
- State
- New Hampshire
- Time zone
- Eastern
- Land area
- 11.6 sq mi · 189 people per sq mi
Where is ZIP code 03823?
03823 centers on 43.175°, -70.941° and covers 11.6 square miles of land plus 0.5 of water. It borders 4 ZIP codes: 03820, 03824, 03861, 03825.
The map draws ZIP code areas only. For the streets inside 03823, 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 03823 compare with the rest of Strafford County?
| Measure | 03823 | In Strafford County | In NH |
|---|---|---|---|
| People (ACS 2020-2024) | 2,203 | 14th of 16 | 141st of 247 |
| Median household income | $148k | 1st of 12 | 17th of 158 |
| Median home value | $477k | 3rd of 15 | 42nd of 191 |
Its median household income is higher than in 96% of U.S. residential ZIP codes, and it is denser than 62% 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 03823?
The 2020 Census counted 1,928 people in 03823; the ACS, which samples households over 2020-2024, estimates 2,203. Between the 2010 and 2020 censuses its population grew 12.2% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 2,203±258 (90% margin)
- 2020 Census count
- 1,928+12.2% since 2010 (1,719)
- Households
- 735
- Median age
- 37.7
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 03823?
Of the 2,203 people the ACS estimates in 03823, 29.0% are under 18 and 14.3% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (81.2%), then Other or two or more (12.3%).
- Under 1829.0%
- 18 to 6456.7%
- 65 and older14.3%
- White, not Hispanic81.2%
- Other or two or more12.3%
- Asian, not Hispanic2.5%
- Black, not Hispanic2.2%
- Hispanic or Latino1.9%
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 03823 earn?
Median household income is $148,365 (ACS 2020-2024), the highest of the 12 ranked ZIP codes in Strafford County. It is not measurably different from 2015-2019 ($155,419 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $148,365±$30,043
- Income per person
- $57,423
- Below the poverty line
- 4.9%
- Unemployed (of the labor force)
- 2.1%
- Adults 25+ with a bachelor's degree
- 52.6%
- Adjusted gross income per tax return, 2022
- $144,620980 returns; wages 65% 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 03823?
FHFA's house price index for 03823, built from repeat sales and appraisals of the same homes, rose 86% from 2015 to 2025 and rose 57% from 2020 to 2025, and moved +1.2% in 2025.
- Median home value (owners' estimate)
- $476,900
- Median gross rent
- $1,574
- Homes owned by their occupants
- 82.9%
- Housing units
- 756
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 03823?
25 business establishments had a location in this ZIP code in 2023, 2 more than in 2018; the most are in wholesale trade (ZIP Code Business Patterns).
- Wholesale trade4
- Professional, scientific, and technical services4
- Health care and social assistance4
- Other services (except public administration)4
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 03823?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 03820 | Dover | 33,440 | $95k | 3.0 mi |
| 03824 | Durham | 15,080 | $124k | 4.1 mi |
| 03861 | Lee | 4,576 | $132k | 5.1 mi |
| 03825 | Barrington | 9,489 | $110k | 5.7 mi |
| 03869 | Rollinsford | 2,456 | $87k | 5.9 mi (near) |
| 03878 | Somersworth | 12,205 | $75k | 6.1 mi (near) |
| 03839 | Rochester | 4,279 | $88k | 6.9 mi (near) |
| 03857 | Newmarket | 9,463 | $101k | 7.2 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.