Residential delivery area · Pennsylvania
ZIP Code 19539: Mertztown, PA
ZIP code 19539 uses the postal name Mertztown, Pennsylvania and lies mostly in Berks County (95% of its land) with the rest in Lehigh County (Census 2020 ZIP-county file). About 3,800 people live there (Census Bureau, ACS 2020-2024). Median household income is $107,656 (Census Bureau, ACS 2020-2024). By Census place, 5% of its land lies in Mertztown (a census-designated place), and 4% in smaller places; 92% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Mertztown · its only residential ZIP
- County
- Berks County (95%); Lehigh County (5%)
- Census places
- Mertztown census-designated place
- Metro area
- Reading, PA
- House districts
- PA-4 (95%), PA-7 (5%) 119th Congress, by share of land
- State
- Pennsylvania
- Time zone
- Eastern
- Land area
- 21.6 sq mi · 177 people per sq mi
Where is ZIP code 19539?
19539 centers on 40.496°, -75.684° and covers 21.6 square miles of land plus 0.1 of water. It borders 9 ZIP codes: 19562, 18011, 19511, 19538, 19536, 18031, 19530, 19522, 19547.
The map draws ZIP code areas only. For the streets inside 19539, 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 19539 compare with the rest of Berks County?
| Measure | 19539 | In Berks County | In PA |
|---|---|---|---|
| People (ACS 2020-2024) | 3,823 | 36th of 61 | 719th of 1,833 |
| Median household income | $108k | 7th of 43 | 147th of 1,015 |
| Median home value | $267k | 28th of 46 | 337th of 1,069 |
Its median household income is higher than in 85% of U.S. residential ZIP codes, and it is denser than 61% 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 19539?
The 2020 Census counted 4,488 people in 19539; the ACS, which samples households over 2020-2024, estimates 3,823. Between the 2010 and 2020 censuses its population fell 2.4% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 3,823±561 (90% margin)
- 2020 Census count
- 4,488−2.4% since 2010 (4,597)
- Households
- 1,489
- Median age
- 47.0
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 19539?
Of the 3,823 people the ACS estimates in 19539, 17.3% are under 18 and 19.7% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (95.6%).
- Under 1817.3%
- 18 to 6463.0%
- 65 and older19.7%
- White, not Hispanic95.6%
- Other or two or more2.3%
- Black, not Hispanic1.0%
- Hispanic or Latino0.6%
- Asian, not Hispanic0.5%
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 19539 earn?
Median household income is $107,656 (ACS 2020-2024), the 7th highest of the 43 ranked ZIP codes in Berks County. It rose from $78,260 in 2015-2019 (in 2024 dollars), a change larger than the surveys' margins of error.
- Median household income
- $107,656±$10,941
- Income per person
- $52,516
- Below the poverty line
- 3.1%
- Unemployed (of the labor force)
- 3.3%
- Adults 25+ with a bachelor's degree
- 27.3%
- Adjusted gross income per tax return, 2022
- $81,4212,360 returns; wages 72% 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 19539?
FHFA's house price index for 19539, built from repeat sales and appraisals of the same homes, rose 77% from 2015 to 2025 and rose 55% from 2020 to 2025, and moved +7.5% in 2025.
- Median home value (owners' estimate)
- $266,700
- Median gross rent
- $1,188
- Homes owned by their occupants
- 94.3%
- Housing units
- 1,507
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 19539?
48 business establishments had a location in this ZIP code in 2023, 3 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction10
- Retail trade9
- Other services (except public administration)8
- Administrative and support and waste management and remediation services4
- Health care and social assistance4
- Accommodation and food services4
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 19539?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 19562 | Topton | 2,947 | $80k | 1.1 mi |
| 18011 | Alburtis | 5,338 | $104k | 2.4 mi |
| 19511 | Bowers | 33 | $50k | 3.2 mi |
| 19538 | Maxatawny | 64 | $49k | 3.7 mi |
| 19536 | Lyon Station | 466 | $55k | 4.1 mi |
| 18031 | Breinigsville | 11,570 | $114k | 4.7 mi |
| 19530 | Kutztown | 15,573 | $72k | 5.9 mi |
| 19522 | Fleetwood | 14,127 | $98k | 7.7 mi |
| 19547 | Oley | 4,579 | $90k | 9.3 mi |
| 18062 | Macungie | 27,110 | $111k | 5.5 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.