Residential delivery area · New Hampshire
ZIP Code 03781: Plainfield, NH
ZIP code 03781 uses the postal name Plainfield, New Hampshire and lies entirely in Sullivan County (Census 2020 ZIP-county file). About 1,900 people live there (Census Bureau, ACS 2020-2024). Median household income is $109,659 (Census Bureau, ACS 2020-2024). By Census place, 1% of its land lies in Plainfield (a census-designated place); 99% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Plainfield · its only residential ZIP
- County
- Sullivan County
- Census places
- Plainfield census-designated place
- Micro area
- Lebanon-Claremont, NH-VT
- House district
- NH-2 119th Congress
- State
- New Hampshire
- Time zone
- Eastern
- Land area
- 47.8 sq mi · 40 people per sq mi
Where is ZIP code 03781?
03781 centers on 43.560°, -72.299° and covers 47.8 square miles of land plus 0.7 of water. It borders 10 ZIP codes: 03770, 05052, 03784, 03766, 03745, 05048, 03753, 05089, 03748, 03773.
The map draws ZIP code areas only. For the streets inside 03781, 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 03781 compare with the rest of Sullivan County?
| Measure | 03781 | In Sullivan County | In NH |
|---|---|---|---|
| People (ACS 2020-2024) | 1,918 | 9th of 18 | 152nd of 247 |
| Median household income | $110k | 2nd of 10 | 58th of 158 |
| Median home value | $426k | 2nd of 12 | 66th of 191 |
Its median household income is higher than in 86% of U.S. residential ZIP codes, and it is denser than 38% 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 03781?
The 2020 Census counted 1,876 people in 03781; the ACS, which samples households over 2020-2024, estimates 1,918. Between the 2010 and 2020 censuses its population grew 2.0% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 1,918
- 2020 Census count
- 1,876+2.0% since 2010 (1,840)
- Households
- 695
- Median age
- 38.8
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 03781?
Of the 1,918 people the ACS estimates in 03781, 25.2% are under 18 and 23.1% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (89.9%).
- Under 1825.2%
- 18 to 6451.6%
- 65 and older23.1%
- White, not Hispanic89.9%
- Other or two or more8.2%
- Asian, not Hispanic1.1%
- Black, not Hispanic0.5%
- Hispanic or Latino0.3%
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 03781 earn?
Median household income is $109,659 (ACS 2020-2024), the 2nd highest of the 10 ranked ZIP codes in Sullivan County. It is not measurably different from 2015-2019 ($100,460 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $109,659±$25,752
- Income per person
- $54,340
- Below the poverty line
- 4.0%
- Unemployed (of the labor force)
- 0.1%
- Adults 25+ with a bachelor's degree
- 46.3%
- Adjusted gross income per tax return, 2022
- $113,282920 returns; wages 62% 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 03781?
FHFA's house price index for 03781, built from repeat sales and appraisals of the same homes, rose 117% from 2015 to 2025 and rose 89% from 2020 to 2025, and moved +9.7% in 2025.
- Median home value (owners' estimate)
- $426,400
- Median gross rent
- $1,604
- Homes owned by their occupants
- 86.5%
- Housing units
- 848
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 03781?
39 business establishments had a location in this ZIP code in 2023, 8 more than in 2018; the most are in administrative and support and waste management and remediation services (ZIP Code Business Patterns).
- Administrative and support and waste management and remediation services10
- Construction8
- Retail trade6
- Other services (except public administration)4
- Professional, scientific, and technical services3
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 03781?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 03770 | Meriden | 604 | $154k | 2.8 mi |
| 05052 | North Hartland, VT | 346 | $52k | 4.0 mi |
| 03784 | West Lebanon | 3,804 | $91k | 5.4 mi |
| 03766 | Lebanon | 11,195 | $101k | 6.0 mi |
| 03745 | Cornish | 1,816 | $92k | 6.0 mi |
| 05048 | Hartland, VT | 2,506 | $100k | 6.6 mi |
| 03753 | Grantham | 3,509 | $106k | 8.1 mi |
| 05089 | Windsor, VT | 4,462 | $56k | 8.4 mi |
| 03748 | Enfield | 4,563 | $95k | 9.5 mi |
| 03773 | Newport | 7,681 | $81k | 13.9 mi |
| 05009 | White River Junction, VT | 0 | – | 6.5 mi (near) |
| 05088 | Wilder, VT | 581 | $72k | 8.0 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.