Montgomery County, Pennsylvania Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 3rd-largest in Pennsylvania
The population of Montgomery County, Pennsylvania is 861,225 as of the 2023 American Community Survey, making it the 3rd-largest county in Pennsylvania. The median household income is $111,521, the median home value is $409,900, and the median age is 41.1.
The population of Montgomery County has grown 9.8% since 2010 (800,881 → 879,190), a +0.67% annualized rate.
861,225
Population
+0.67%
Annual growth
1783
People / sq mi
$111,521
Median Income
$409,900
Median Home Value
Montgomery County covers 483 sq mi of land at 1783.3 people per square mile.
About Montgomery County, PA
Montgomery County is defined demographically by education — 52.3% of adults hold a bachelor’s degree, above the national average. With 861,225 residents, Montgomery County is a county in Pennsylvania. It is the #3-largest of all counties in Pennsylvania nationally.
Income is a real outlier — the median household pulls in $111,521, putting Montgomery County near the top of US counties. Hardship is rare relative to US counties: a poverty rate of just 4.2%, below the national 12.4%. Housing is expensive: the median home is worth $409,900, with typical rent around $1,612.
Degree attainment is near the top of the range for US counties: 52.3% of adults 25+ hold a bachelor’s, above the 35.0% national rate. Remote work is widespread — 21.1% of workers stay home, above the national 14.0%, and the average commute runs about 28 minutes each way.
The education numbers are the throughline: a college-heavy population in Montgomery County usually coincides with higher incomes and a workforce concentrated in professional and information industries.
Montgomery County Population History (2010-2024)
The county of Montgomery County had a population of 800,881 in 2010 and 879,190 in 2024, a 9.8% growth over 14 years. The peak was 879,190 in 2024. Average annual growth rate: 0.67%.
879,190
Population (2024)
800,881
Population (2010)
879,190
Peak (2024)
0.67%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 800,881 |
| 2011 | 805,333 |
| 2012 | 808,782 |
| 2013 | 812,750 |
| 2014 | 815,966 |
| 2015 | 817,432 |
| 2016 | 820,106 |
| 2017 | 824,533 |
| 2018 | 826,995 |
| 2019 | 830,397 |
| 2020 | 856,900 |
| 2021 | 864,252 |
| 2022 | 865,848 |
| 2023 | 871,673 |
| 2024 | 879,190 |
Race & Ethnicity
| White | 74.4% |
| Black or African American | 9.3% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.8% |
| Two or More Races | 0.0% |
Age & Sex
41.1
Median Age
51.0%
Female
49.0%
Male
18.4%
Age 65+
Age Distribution
Children (under 15): 17.5% · Seniors (65+): 18.4%
Income & Poverty
| Median household income | $111,521+$35,440 vs state |
| Mean household income | $154,372 |
| Per-capita income | $60,507 |
| Poverty rate | 4.2%-3.9% vs state |
| Unemployment rate | 3.0% |
| Employment-to-population | 64.9% |
Top Industries by Employment
The largest employment sector in Montgomery County is professional & business services, accounting for 25.6% of workers.
How residents commute
3.0%
Drive alone
2.0%
Carpool
66.6%
Public transit
21.1%
Work from home
27.9 min
Avg commute
Housing
$409,900+$169,400 vs state
Median home value
$1,612
Median rent
71.7%
Homeownership rate
348,696
Total housing units
95.6%
Occupied
4.4%
Vacant
28.3%
Renter-occupied
Social & access
96.0%
With health insurance
96.4%
With broadband internet
18.9%
Foreign-born
4.9%
Veterans (18+)
10.4%
With a disability
85.5%
Speak language other than English at home
Education
94.9%
High School+
52.3%
Bachelor's+
Largest cities in Pennsylvania
Other counties in Pennsylvania
Part of Pennsylvania
Metro areas in Pennsylvania
County rankings
Common questions about Montgomery County, PA
Frequently Asked Questions
Montgomery County, Pennsylvania has a population of 861,225 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 3rd-largest county in Pennsylvania. Population density is 1783 people per square mile.
The population of Montgomery County has grown 9.8% since 2010 (800,881 → 879,190), a +0.67% annualized rate.
The median household income in Montgomery County, Pennsylvania is $111,521, with mean (average) household income of $154,372 and per-capita income of $60,507. 4.2% of residents live below the federal poverty level.
In Montgomery County, the largest racial and ethnic groups are White (74.4%), Black or African American (9.3%), Hispanic or Latino (0.8%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Montgomery County, Pennsylvania is 41.1 years. Residents are 51.0% female and 49.0% male.
The median home value in Montgomery County is $409,900 and median monthly rent is $1,612. 71.7% of occupied housing units are owner-occupied. The county has 348,696 total housing units, 4.4% of which are vacant.
The largest employment sector in Montgomery County, Pennsylvania is professional, scientific, and management services, employing 25.6% of workers. The unemployment rate is 3.0%.
Philadelphia is among the largest cities associated with Montgomery County, Pennsylvania, with a population of 1,582,432.
Montgomery County, PA Climate
Montgomery County, PA has an average annual temperature of 11.2°C (52°F) and receives about 1123 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
11.2°C
Avg Temp
1123
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -2° / 29° | 87 mm |
| February | 0° / 31° | 73 mm |
| March | 4° / 40° | 89 mm |
| April | 10° / 50° | 96 mm |
| May | 16° / 60° | 109 mm |
| June | 21° / 69° | 93 mm |
| July | 24° / 74° | 110 mm |
| August | 23° / 73° | 105 mm |
| September | 19° / 66° | 100 mm |
| October | 12° / 54° | 77 mm |
| November | 7° / 45° | 97 mm |
| December | 2° / 35° | 87 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 Montgomery County, PA
The most comfortable months to visit Montgomery County, PA are typically June, August and September, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 30°C high). The coldest is January (near -6°C low). July is usually the wettest month.
Where to stay near Montgomery County
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Top-rated places to stay near Montgomery County
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.