Residential delivery area · Pennsylvania
ZIP Code 17821: Danville, PA
ZIP code 17821 uses the postal name Danville, Pennsylvania and lies mostly in Montour County (70% of its land), reaching into Northumberland County and Columbia County (Census 2020 ZIP-county file). About 19,000 people live there (Census Bureau, ACS 2020-2024), the more populous of Danville's 2 residential ZIP codes. Median household income is $76,971 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Riverside (3%) and Danville (1%); 95% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Danville · 2 residential ZIPs
- County
- Montour County (70%); Northumberland County (24%); Columbia County (6%)
- Census places
- Riverside (3%); Danville (1%)
- Micro area
- Sunbury, PA
- House district
- PA-9 119th Congress
- State
- Pennsylvania
- Time zone
- Eastern
- Land area
- 134.5 sq mi · 138 people per sq mi
Where is ZIP code 17821?
17821 centers on 40.990°, -76.644° and covers 134.5 square miles of land plus 2.7 of water. It borders 12 ZIP codes: 17868, 17822, 17884, 17857, 17847, 17772, 17860, 17815, 17824, 17801 and more.
The map draws ZIP code areas only. For the streets inside 17821, 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 17821 compare with the rest of Danville?
| Measure | 17821 | In Danville | In Montour County | In PA |
|---|---|---|---|---|
| People (ACS 2020-2024) | 18,613 | 1st of 2 | 1st of 9 | 217th of 1,833 |
| Median household income | $77k | 1st of 1 | 3rd of 6 | 439th of 1,015 |
| Median home value | $250k | 1st of 1 | 1st of 7 | 393rd of 1,069 |
Its median household income is higher than in 58% 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 17821?
The 2020 Census counted 18,663 people in 17821; the ACS, which samples households over 2020-2024, estimates 18,613. Between the 2010 and 2020 censuses its population grew 2.4% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 18,613
- 2020 Census count
- 18,663+2.4% since 2010 (18,219)
- Households
- 8,017
- Median age
- 42.9
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 17821?
Of the 18,613 people the ACS estimates in 17821, 19.9% are under 18 and 22.2% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (88.3%).
- Under 1819.9%
- 18 to 6457.9%
- 65 and older22.2%
- White, not Hispanic88.3%
- Hispanic or Latino3.7%
- Asian, not Hispanic3.4%
- Other or two or more2.4%
- Black, not Hispanic2.3%
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 17821 earn?
Median household income is $76,971 (ACS 2020-2024), the 3rd highest of the 6 ranked ZIP codes in Montour County. It is not measurably different from 2015-2019 ($72,871 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $76,971
- Income per person
- $46,808
- Below the poverty line
- 7.6%
- Unemployed (of the labor force)
- 2.6%
- Adults 25+ with a bachelor's degree
- 39.1%
- Adjusted gross income per tax return, 2022
- $89,5249,520 returns; wages 71% 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 17821?
FHFA's house price index for 17821, built from repeat sales and appraisals of the same homes, rose 58% from 2015 to 2025 and rose 44% from 2020 to 2025, and moved +21.3% in 2025.
- Median home value (owners' estimate)
- $249,500
- Median gross rent
- $1,163
- Homes owned by their occupants
- 69.8%
- Housing units
- 8,288
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 17821?
434 business establishments had a location in this ZIP code in 2023, 70 more than in 2018; the most are in health care and social assistance (ZIP Code Business Patterns).
- Health care and social assistance98
- Other services (except public administration)58
- Retail trade55
- Accommodation and food services43
- Construction26
- Finance and insurance26
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 17821?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 17868 | Riverside | 719 | $76k | 2.5 mi |
| 17822 | Danville | 11 | – | 2.6 mi |
| 17884 | Washingtonville | 263 | $56k | 4.6 mi |
| 17857 | Northumberland | 7,671 | $67k | 7.8 mi |
| 17847 | Milton | 11,260 | $59k | 8.8 mi |
| 17772 | Turbotville | 2,693 | $81k | 10.0 mi |
| 17860 | Paxinos | 2,332 | $92k | 10.6 mi |
| 17815 | Bloomsburg | 29,790 | $68k | 11.4 mi |
| 17824 | Elysburg | 3,949 | $118k | 11.6 mi |
| 17801 | Sunbury | 16,429 | $61k | 12.2 mi |
| 17777 | Watsontown | 7,030 | $67k | 12.3 mi |
| 17820 | Catawissa | 5,499 | $68k | 14.1 mi |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.