Residential delivery area · Pennsylvania
ZIP Code 16159: West Middlesex, PA
ZIP code 16159 uses the postal name West Middlesex, Pennsylvania and lies mostly in Mercer County (90% of its land) with the rest in Lawrence County (Census 2020 ZIP-county file). About 4,500 people live there (Census Bureau, ACS 2020-2024). Median household income is $69,391 (Census Bureau, ACS 2020-2024). By Census place, its land lies in West Middlesex (3%) and Wheatland (2%), and 4% in smaller places; 91% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- West Middlesex · its only residential ZIP
- County
- Mercer County (90%); Lawrence County (10%)
- Census places
- West Middlesex (3%); Wheatland (2%)
- Micro area
- Hermitage, PA
- House district
- PA-16 119th Congress
- State
- Pennsylvania
- Time zone
- Eastern
- Land area
- 28.1 sq mi · 159 people per sq mi
Where is ZIP code 16159?
16159 centers on 41.153°, -80.475° and covers 28.1 square miles of land plus 0.1 of water. It borders 10 ZIP codes: 16161, 16143, 16121, 16140, 44425, 16148, 44438, 44436, 16142, 16137.
The map draws ZIP code areas only. For the streets inside 16159, 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 16159 compare with the rest of Mercer County?
| Measure | 16159 | In Mercer County | In PA |
|---|---|---|---|
| People (ACS 2020-2024) | 4,455 | 10th of 28 | 673rd of 1,833 |
| Median household income | $69k | 8th of 21 | 601st of 1,015 |
| Median home value | $178k | 10th of 22 | 721st of 1,069 |
Its median household income is higher than in 46% of U.S. residential ZIP codes, and it is denser than 60% 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 16159?
The 2020 Census counted 4,264 people in 16159; the ACS, which samples households over 2020-2024, estimates 4,455. Between the 2010 and 2020 censuses its population fell 9.4% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 4,455±479 (90% margin)
- 2020 Census count
- 4,264−9.4% since 2010 (4,706)
- Households
- 1,993
- Median age
- 53.1
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 16159?
Of the 4,455 people the ACS estimates in 16159, 19.3% are under 18 and 30.3% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (95.6%).
- Under 1819.3%
- 18 to 6450.3%
- 65 and older30.3%
- White, not Hispanic95.6%
- Other or two or more3.1%
- Black, not Hispanic1.0%
- Asian, not Hispanic0.3%
- Hispanic or Latino0.0%
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 16159 earn?
Median household income is $69,391 (ACS 2020-2024), the 8th highest of the 21 ranked ZIP codes in Mercer County. It is not measurably different from 2015-2019 ($64,454 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $69,391±$10,465
- Income per person
- $34,052
- Below the poverty line
- 8.6%
- Unemployed (of the labor force)
- 4.2%
- Adults 25+ with a bachelor's degree
- 24.2%
- Adjusted gross income per tax return, 2022
- $66,3702,200 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 16159?
FHFA's house price index for 16159, built from repeat sales and appraisals of the same homes, rose 80% from 2015 to 2025 and rose 58% from 2020 to 2025, and moved +24.4% in 2025.
- Median home value (owners' estimate)
- $178,000
- Median gross rent
- $880
- Homes owned by their occupants
- 80.2%
- Housing units
- 2,191
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 16159?
106 business establishments had a location in this ZIP code in 2023, 1 more than in 2018; the most are in manufacturing (ZIP Code Business Patterns).
- Manufacturing17
- Retail trade14
- Administrative and support and waste management and remediation services12
- Other services (except public administration)12
- Construction11
- Accommodation and food services8
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 16159?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 16161 | Wheatland | 819 | $41k | 3.5 mi |
| 16143 | Pulaski | 2,100 | $85k | 3.5 mi |
| 16121 | Farrell | 4,199 | $43k | 4.1 mi |
| 16140 | New Bedford | 293 | – | 4.5 mi |
| 44425 | Hubbard, OH | 13,552 | $62k | 5.5 mi |
| 16148 | Hermitage | 16,545 | $71k | 6.0 mi |
| 44438 | Masury, OH | 4,950 | $41k | 6.6 mi |
| 44436 | Lowellville, OH | 3,077 | $70k | 7.2 mi |
| 16142 | New Wilmington | 5,522 | $84k | 7.5 mi |
| 16137 | Mercer | 12,490 | $71k | 13.4 mi |
| 16146 | Sharon | 12,936 | $46k | 5.8 mi (near) |
| 16155 | Villa Maria | 98 | – | 6.2 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.