Residential delivery area · Pennsylvania
ZIP Code 18037: Coplay, PA
ZIP code 18037 uses the postal name Coplay, Pennsylvania and lies entirely in Lehigh County (Census 2020 ZIP-county file). About 7,500 people live there (Census Bureau, ACS 2020-2024). Median household income is $83,542 (Census Bureau, ACS 2020-2024). By Census place, 8% of its land lies in Coplay; 93% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Coplay · its only residential ZIP
- County
- Lehigh County
- Census places
- Coplay
- Metro area
- Allentown-Bethlehem-Easton, PA-NJ
- House district
- PA-7 119th Congress
- State
- Pennsylvania
- Time zone
- Eastern
- Land area
- 7.6 sq mi · 982 people per sq mi
Where is ZIP code 18037?
18037 centers on 40.683°, -75.548° and covers 7.6 square miles of land plus 0.1 of water. It borders 6 ZIP codes: 18059, 18052, 18078, 18067, 18104, 18080.
The map draws ZIP code areas only. For the streets inside 18037, 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 18037 compare with the rest of Lehigh County?
| Measure | 18037 | In Lehigh County | In PA |
|---|---|---|---|
| People (ACS 2020-2024) | 7,472 | 19th of 35 | 509th of 1,833 |
| Median household income | $84k | 17th of 27 | 340th of 1,015 |
| Median home value | $257k | 24th of 28 | 365th of 1,069 |
Its median household income is higher than in 66% of U.S. residential ZIP codes, and it is denser than 78% 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 18037?
The 2020 Census counted 7,444 people in 18037; the ACS, which samples households over 2020-2024, estimates 7,472. Between the 2010 and 2020 censuses its population grew 5.3% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 7,472
- 2020 Census count
- 7,444+5.3% since 2010 (7,070)
- Households
- 3,035
- Median age
- 44.3
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 18037?
Of the 7,472 people the ACS estimates in 18037, 22.1% are under 18 and 18.7% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (76.4%), then Hispanic or Latino (16.0%).
- Under 1822.1%
- 18 to 6459.2%
- 65 and older18.7%
- White, not Hispanic76.4%
- Hispanic or Latino16.0%
- Other or two or more4.4%
- Black, not Hispanic2.7%
- 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 18037 earn?
Median household income is $83,542 (ACS 2020-2024), the 17th highest of the 27 ranked ZIP codes in Lehigh County. It is not measurably different from 2015-2019 ($80,594 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $83,542
- Income per person
- $41,714
- Below the poverty line
- 7.5%
- Unemployed (of the labor force)
- 1.8%
- Adults 25+ with a bachelor's degree
- 28.5%
- Adjusted gross income per tax return, 2022
- $73,5413,980 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 18037?
FHFA's house price index for 18037, built from repeat sales and appraisals of the same homes, rose 94% from 2015 to 2025 and rose 61% from 2020 to 2025, and moved +11.7% in 2025.
- Median home value (owners' estimate)
- $256,600
- Median gross rent
- $1,203
- Homes owned by their occupants
- 79.1%
- Housing units
- 3,160
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 18037?
104 business establishments had a location in this ZIP code in 2023, 1 more than in 2018; the most are in other services (except public administration) (ZIP Code Business Patterns).
- Other services (except public administration)15
- Construction14
- Accommodation and food services12
- Retail trade11
- Health care and social assistance8
- Professional, scientific, and technical services7
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 18037?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 18059 | Laurys Station | 744 | $168k | 2.8 mi |
| 18052 | Whitehall | 29,451 | $76k | 2.9 mi |
| 18078 | Schnecksville | 7,857 | $121k | 3.9 mi |
| 18067 | Northampton | 19,590 | $94k | 4.2 mi |
| 18104 | Allentown | 48,683 | $95k | 4.9 mi |
| 18080 | Slatington | 11,226 | $75k | 5.8 mi |
| 18065 | Neffs | 577 | – | 3.6 mi (near) |
| 18086 | Treichlers | 229 | $69k | 3.9 mi (near) |
| 18032 | Catasauqua | 9,555 | $81k | 4.6 mi (near) |
| 18035 | Cherryville | 39 | – | 4.8 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.