Lehigh County, Pennsylvania Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 10th-largest in Pennsylvania
The population of Lehigh County, Pennsylvania is 375,408 as of the 2023 American Community Survey, making it the 10th-largest county in Pennsylvania. The median household income is $77,493, the median home value is $276,100, and the median age is 39.3.
The population of Lehigh County has grown 10.2% since 2010 (350,008 → 385,655), a +0.70% annualized rate.
375,408
Population
+0.70%
Annual growth
1087
People / sq mi
$77,493
Median Income
$276,100
Median Home Value
Lehigh County covers 345 sq mi of land at 1087.1 people per square mile.
About Lehigh County, PA
Lehigh County stands apart on settlement density — it is among the most densely settled of US counties, at roughly 1,087 people per square mile. With 375,408 residents, Lehigh County is a county in Pennsylvania. It is the #10-largest of all counties in Pennsylvania nationally.
The typical household earns $77,493 a year, near the US median of $78,538. The poverty rate is 8.2%, below the national 12.4%. The median home value is $276,100, with typical rent around $1,326.
About 33.4% of adults 25 and older have a bachelor’s degree, near the 35.0% national figure. A solid 12.1% of workers are based at home, below the national 14.0%, and the average commute runs about 25 minutes each way.
That density explains much of the rest of the profile in Lehigh County: denser places lean toward renting, shorter commutes by transit, and a younger working-age mix.
Lehigh County Population History (2010-2024)
The county of Lehigh County had a population of 350,008 in 2010 and 385,655 in 2024, a 10.2% growth over 14 years. The peak was 385,655 in 2024. Average annual growth rate: 0.70%.
385,655
Population (2024)
350,008
Population (2010)
385,655
Peak (2024)
0.70%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 350,008 |
| 2011 | 353,317 |
| 2012 | 354,673 |
| 2013 | 355,273 |
| 2014 | 357,591 |
| 2015 | 359,689 |
| 2016 | 362,357 |
| 2017 | 365,772 |
| 2018 | 368,452 |
| 2019 | 369,308 |
| 2020 | 374,493 |
| 2021 | 375,922 |
| 2022 | 377,019 |
| 2023 | 380,872 |
| 2024 | 385,655 |
Race & Ethnicity
| White | 66.8% |
| Black or African American | 6.9% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.2% |
| Two or More Races | 0.0% |
Age & Sex
39.3
Median Age
50.8%
Female
49.2%
Male
17.4%
Age 65+
Age Distribution
Children (under 15): 18.5% · Seniors (65+): 17.4%
Income & Poverty
| Median household income | $77,493+$1,412 vs state |
| Mean household income | $107,564 |
| Per-capita income | $41,804 |
| Poverty rate | 8.2%+0.1% vs state |
| Unemployment rate | 3.6% |
| Employment-to-population | 61.0% |
Top Industries by Employment
The largest employment sector in Lehigh County is professional & business services, accounting for 26.2% of workers.
How residents commute
1.5%
Drive alone
2.2%
Carpool
75.1%
Public transit
12.1%
Work from home
25.1 min
Avg commute
Housing
$276,100+$35,600 vs state
Median home value
$1,326
Median rent
65.2%
Homeownership rate
150,547
Total housing units
95.3%
Occupied
4.7%
Vacant
34.8%
Renter-occupied
Social & access
93.7%
With health insurance
93.9%
With broadband internet
22.1%
Foreign-born
5.8%
Veterans (18+)
13.1%
With a disability
74.6%
Speak language other than English at home
Education
90.3%
High School+
33.4%
Bachelor's+
Largest cities in Pennsylvania
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County rankings
Common questions about Lehigh County, PA
Frequently Asked Questions
Lehigh County, Pennsylvania has a population of 375,408 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 10th-largest county in Pennsylvania. Population density is 1087 people per square mile.
The population of Lehigh County has grown 10.2% since 2010 (350,008 → 385,655), a +0.70% annualized rate.
The median household income in Lehigh County, Pennsylvania is $77,493, with mean (average) household income of $107,564 and per-capita income of $41,804. 8.2% of residents live below the federal poverty level.
In Lehigh County, the largest racial and ethnic groups are White (66.8%), Black or African American (6.9%), Hispanic or Latino (1.2%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Lehigh County, Pennsylvania is 39.3 years. Residents are 50.8% female and 49.2% male.
The median home value in Lehigh County is $276,100 and median monthly rent is $1,326. 65.2% of occupied housing units are owner-occupied. The county has 150,547 total housing units, 4.7% of which are vacant.
The largest employment sector in Lehigh County, Pennsylvania is professional, scientific, and management services, employing 26.2% of workers. The unemployment rate is 3.6%.
Philadelphia is among the largest cities associated with Lehigh County, Pennsylvania, with a population of 1,582,432.
Lehigh County, PA Climate
Lehigh County, PA has an average annual temperature of 10.2°C (50°F) and receives about 1147 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
10.2°C
Avg Temp
1147
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -3° / 27° | 84 mm |
| February | -2° / 29° | 69 mm |
| March | 3° / 38° | 88 mm |
| April | 9° / 48° | 94 mm |
| May | 15° / 59° | 117 mm |
| June | 20° / 68° | 107 mm |
| July | 23° / 73° | 105 mm |
| August | 22° / 72° | 105 mm |
| September | 18° / 64° | 103 mm |
| October | 12° / 53° | 88 mm |
| November | 6° / 43° | 99 mm |
| December | 0° / 33° | 88 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Lehigh County, PA
The most comfortable months to visit Lehigh County, PA are typically August, June and July, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 29°C high). The coldest is January (near -8°C low). May is usually the wettest month.
Where to stay near Lehigh County
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.