Lehigh County · Pennsylvania
ZIP code 18109
- Population
- 18,117
- Median income
- $55,437
- Median home
- $180,200
- Sales tax
- 6%
ZCTA residents
Household, past 12 months
Owner-occupied value
Pennsylvania state rate
Quick answer
ZIP 18109 sits in Lehigh County, Pennsylvania and is home to 18,117 people. Median household income is $55,437, the median home is worth $180,200 and median gross rent is $1,239. 52.6% of households own their home, and purchases are taxed at 6% (Pennsylvania state rate).
- County
- Lehigh County
- State
- Pennsylvania (PA)
- Area codes
- Not published
- Metro area
- Outside covered metros
FIPS 42077
1,833 ZIPs covered
No NANPA match for this ZIP
Rate jurisdiction used for tax
The numbers for 18109
American Community Survey 2019-2023 ACS 5-year estimates for this ZCTA.
- Population
- 18,117ZIP 18109 residents
- Median household income
- $55,437Past 12 months, inflation adjusted
- Median home value
- $180,200Owner-occupied units
- Median gross rent
- $1,239Rent plus utilities, monthly
- Median age
- 34.6 yrsAll residents
- Homeownership rate
- 52.6%Owner-occupied households
Sales tax in 18109
What a purchase inside this ZIP costs at checkout.
Pennsylvania levies 6% statewide, and counties, cities and special districts inside this ZIP can add their own local rate on top. Check the county page for the local component before you quote a price.
Affordability in this ZIP
Derived from the Census medians above — indicative, not an offer.
A rent burden above 30% is the federal threshold for cost-burdened households, and a price-to-income multiple above 4× is generally considered a stretched housing market. The mortgage figure is principal and interest only — taxes, insurance and HOA dues are extra.
How 18109 compares
ZIP 18109 against the median ZIP in Lehigh County and across Pennsylvania.
| Measure | ZIP 18109 | County median | State median | vs state |
|---|---|---|---|---|
| Median household income | $55,437 | $93,924 | $70,000 | -21% |
| Median home value | $180,200 | $296,800 | $187,400 | -4% |
| Median gross rent | $1,239 | $1,282 | $953 | +30% |
| Population | 18,117 | 8,188 | 2,230 | +712% |
Medians are computed across the 28 ZIP areas in Lehigh County and the 1833 ZIP areas in Pennsylvania.
Statewide rank
Where this ZIP places among all 1833 Pennsylvania ZIP areas.
- Income
- #1,360
- Home value
- #886
- Population
- #225
richer than 18% of 1,668 state ZIPs
above 47% of 1,672 state ZIPs
larger than 88% of 1,833 state ZIPs
Comparable ZIP codes
Pennsylvania ZIP areas with almost the same household income.
Nearby ZIP codes
Other ZIP codes filed under Lehigh County.
ZIP 18109 questions
Common questions about this ZIP code.
- Where is ZIP code 18109?
- ZIP 18109 lies mostly in Lehigh County, Pennsylvania. County assignment follows the largest share of land area, so a ZIP straddling a county line is filed under its dominant county.
- What sales tax do I pay in 18109?
- Pennsylvania charges 6% statewide, plus any county, city or district rate that applies locally.
- Is 18109 expensive to live in?
- Median rent runs $1,239 a month, about 27% of median household income, and the median home is worth $180,200 — -4% against the typical Pennsylvania ZIP.
- Is a ZCTA the same as a postal ZIP code?
- Not exactly. The Census builds ZIP Code Tabulation Areas from the ZIP codes of addresses inside each census block, so a ZCTA can differ slightly from the USPS delivery route of the same number, and PO-box-only ZIPs have no ZCTA at all.
Keep going
Related pages for this area.
Sources & transparency
- US Census Bureau, ACS 2019-2023 5-year estimates — 2019-2023 ACS 5-year — population, income, housing
- Census 2020 ZCTA-to-county relationship file — County assignment by largest land-area overlap
- Pennsylvania Department of Revenue — Sales tax rates and local add-ons
Last reviewed December 2024. Figures are published for reference and can change; verify with the source agency before filing or contracting. How we build and check this data.