Residential delivery area · Pennsylvania
ZIP Code 17603: Lancaster, PA
ZIP code 17603 uses the postal name Lancaster, Pennsylvania and lies entirely in Lancaster County (Census 2020 ZIP-county file). About 68,000 people live there (Census Bureau, ACS 2020-2024), the most populous of Lancaster's 4 residential ZIP codes. Median household income is $77,084 (Census Bureau, ACS 2020-2024). By Census place, 8% of its land lies in Lancaster, and under 1% in smaller places; 91% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Lancaster · 4 residential ZIPs
- County
- Lancaster County
- Census places
- Lancaster
- Metro area
- Lancaster, PA
- House district
- PA-11 119th Congress
- State
- Pennsylvania
- Time zone
- Eastern
- Land area
- 30.0 sq mi · 2,253 people per sq mi
- PO Box ZIPs
- 7 more ZIP codes use the name Lancaster for PO boxes or single organizations
Where is ZIP code 17603?
17603 centers on 40.031°, -76.330° and covers 30.0 square miles of land plus 0.4 of water. It borders 9 ZIP codes: 17504, 17601, 17551, 17602, 17554, 17584, 17582, 17516, 17512.
The map draws ZIP code areas only. For the streets inside 17603, 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 17603 compare with the rest of Lancaster?
| Measure | 17603 | In Lancaster | In Lancaster County | In PA |
|---|---|---|---|---|
| People (ACS 2020-2024) | 67,571 | 1st of 4 | 1st of 60 | 2nd of 1,833 |
| Median household income | $77k | 2nd of 3 | 38th of 44 | 437th of 1,015 |
| Median home value | $262k | 3rd of 3 | 44th of 47 | 351st of 1,069 |
Its median household income is higher than in 58% of U.S. residential ZIP codes, and it is denser than 86% 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 17603?
The 2020 Census counted 66,739 people in 17603; the ACS, which samples households over 2020-2024, estimates 67,571. Between the 2010 and 2020 censuses its population grew 7.7% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 67,571
- 2020 Census count
- 66,739+7.7% since 2010 (61,973)
- Households
- 27,248
- Median age
- 35.7
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 17603?
Of the 67,571 people the ACS estimates in 17603, 21.4% are under 18 and 16.5% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (57.1%), then Hispanic or Latino (27.3%).
- Under 1821.4%
- 18 to 6462.2%
- 65 and older16.5%
- White, not Hispanic57.1%
- Hispanic or Latino27.3%
- Black, not Hispanic7.0%
- Other or two or more4.9%
- Asian, not Hispanic3.6%
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 17603 earn?
Median household income is $77,084 (ACS 2020-2024), the 38th highest of the 44 ranked ZIP codes in Lancaster County. It rose from $67,567 in 2015-2019 (in 2024 dollars), a change larger than the surveys' margins of error.
- Median household income
- $77,084
- Income per person
- $42,414
- Below the poverty line
- 13.0%
- Unemployed (of the labor force)
- 5.3%
- Adults 25+ with a bachelor's degree
- 37.7%
- Adjusted gross income per tax return, 2022
- $70,55233,280 returns; wages 68% 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 17603?
FHFA's house price index for 17603, built from repeat sales and appraisals of the same homes, rose 112% from 2015 to 2025 and rose 62% from 2020 to 2025, and moved +4.1% in 2025.
- Median home value (owners' estimate)
- $262,400
- Median gross rent
- $1,355
- Homes owned by their occupants
- 61.9%
- Housing units
- 28,466
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 17603?
1,501 business establishments had a location in this ZIP code in 2023, 9 more than in 2018; the most are in retail trade (ZIP Code Business Patterns).
- Retail trade213
- Other services (except public administration)194
- Health care and social assistance185
- Professional, scientific, and technical services176
- Accommodation and food services174
- Construction101
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 17603?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 17504 | Bausman | 105 | $89k | 0.5 mi |
| 17601 | Lancaster | 56,382 | $102k | 3.0 mi |
| 17551 | Millersville | 11,753 | $69k | 4.3 mi |
| 17602 | Lancaster | 52,217 | $76k | 4.6 mi |
| 17554 | Mountville | 7,453 | $98k | 5.0 mi |
| 17584 | Willow Street | 11,646 | $109k | 6.0 mi |
| 17582 | Washington Boro | 1,702 | $100k | 7.2 mi |
| 17516 | Conestoga | 5,180 | $104k | 7.7 mi |
| 17512 | Columbia | 18,148 | $67k | 8.3 mi |
| 17520 | East Petersburg | 5,040 | $93k | 4.7 mi (near) |
| 17538 | Landisville | 7,314 | $87k | 5.7 mi (near) |
| 17606 | Lancaster | 404 | – | 5.8 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.