Demographics of Northumberland County, Pennsylvania

Northumberland County, Pennsylvania had 89,920 people on July 1, 2025, by the Census Bureau’s estimate: −1,624 since July 2020. Age, income, poverty, housing and origin below come from the American Community Survey, averaged over 2020–2024, each with its margin of error.

Northumberland County, in four figures

89,920
Population: July 1, 2025, Vintage 2025 estimate.; −1.8%
Change since July 2020: −1,624 people.; 44.5 ±0.2
Median age: ACS 2020–⁠2024.; $60,583 ±$1,488
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. Each year's change is births less deaths, net moves from abroad and net moves from elsewhere in the country, with the Bureau's small residual. The 2020 row's components run 3 months, from the April census to July 1.

Northumberland County, Pennsylvania's population shrank 1.8% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Northumberland County, Pennsylvania's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).

Source: The Census Bureau

About this chart

The figures

Northumberland County, Pennsylvania's population shrank 1.8% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Northumberland County, Pennsylvania's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).
July 1	Population	Index	United States
2020	91,544	100.0	100.0
2021	90,978	99.4	100.2
2022	90,075	98.4	100.7
2023	90,139	98.5	101.6
2024	89,969	98.3	102.5
2025	89,920	98.2	103.1

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Population of Northumberland County, Pennsylvania on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	91,544	−102	−93	0	−33
2021	90,978	−566	−586	+19	−71
2022	90,075	−903	−512	+38	−401
2023	90,139	+64	−357	+113	+324
2024	89,969	−170	−377	+82	+139
2025	89,920	−49	−377	+26	+303

Age, 2020–2024

The median age is 44.5 ±0.2: for men 43.1 ±0.5 and for women 46.2 ±0.4. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Northumberland County by age, ACS 2020–2024
Age	People	Share	Pennsylvania	United States
Under 5	4,429 ±147	4.9% ±0.2	5.2% ±<0.1	5.6% ±<0.1
5 to 17	13,390 ±508	14.8% ±0.6	15.2% ±0.1	16.3% ±<0.1
18 to 24	6,196 ±439	6.8% ±0.5	9.0% ±<0.1	9.1% ±<0.1
25 to 44	21,838 ±558	24.1% ±0.6	25.5% ±0.1	26.9% ±<0.1
45 to 64	24,503 ±615	27.1% ±0.7	25.6% ±0.1	24.8% ±<0.1
65 and over	20,204 ±710	22.3% ±0.8	19.5% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $60,583 ±$1,488, and income per person $33,575 ±$955, in 2024 dollars. The median is $77,971 ±$342 in Pennsylvania and $80,734 ±$166 in the United States.

Households by income

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Households in Northumberland County by income, ACS 2020–2024
Household income	Households	Share	Pennsylvania	United States
Under $25,000	6,969 ±582	18.4% ±1.5	15.1% ±0.1	14.6% ±<0.1
$25,000 to $49,999	8,128 ±595	21.5% ±1.6	17.4% ±0.1	16.7% ±<0.1
$50,000 to $74,999	7,584 ±586	20.0% ±1.5	15.9% ±0.1	15.5% ±<0.1
$75,000 to $99,999	4,803 ±395	12.7% ±1.0	12.8% ±0.1	12.6% ±<0.1
$100,000 to $149,999	6,132 ±449	16.2% ±1.2	17.7% ±0.1	17.5% ±<0.1
$150,000 to $199,999	2,543 ±330	6.7% ±0.9	9.3% ±0.1	9.6% ±<0.1
$200,000 or more	1,727 ±266	4.6% ±0.7	11.8% ±0.1	13.4% ±0.1

Poverty by age

The poverty rate is the share of people whose family income is below the federal threshold for their family’s size, of everyone for whom the Bureau determines it (B17020).

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Poverty rate in Northumberland County by age, ACS 2020–2024
Age	Below poverty	Rate	Pennsylvania	United States
All ages	10,939 ±1,293	12.6% ±1.5	11.7% ±0.1	12.5% ±0.1
Under 18	2,852 ±432	16.3% ±2.4	15.6% ±0.2	16.1% ±0.1
18 to 59	4,903 ±576	11.3% ±1.3	11.0% ±0.2	11.6% ±0.1
60 and over	3,184 ±437	12.3% ±1.7	10.1% ±0.2	11.0% ±<0.1

Housing, 2020–2024

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Housing in Northumberland County, ACS 2020–2024
Measure	Northumberland County	Pennsylvania	United States
Housing units	43,395 ±52	5,806,452 ±672	143,775,355 ±10,234
Occupied	87.3% ±1.0	90.8% ±0.2	89.9% ±0.1
Vacant	12.7% ±1.0	9.2% ±0.2	10.1% ±0.1
Owner occupied	75.5% ±1.3	69.3% ±0.3	65.2% ±0.3
Renter occupied	24.5% ±1.6	30.7% ±0.2	34.8% ±0.1
Median home value	$162,400 ±$5,611	$254,500 ±$767	$332,700 ±$236
Median gross rent	$806 ±$37	$1,209 ±$5	$1,413 ±$2
Median year built	1954 ±2	1965 ±1	1980 ±1

Occupied and vacant are shares of all housing units; owner and renter occupied are shares of occupied units. Value and rent are medians in 2024 dollars.

Origin and place of birth, 2020–2024

Hispanic or Latino origin is not a race in the Census Bureau’s tables. Here the people of Hispanic origin, of any race, are one row, and everyone else is counted by race alone (B03002), so the rows add to the whole.

Hispanic origin and race

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People in Northumberland County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Pennsylvania	United States
Hispanic or Latino	4,702 ±0	5.2% ±<0.1	8.7% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	80,361 ±416	88.7% ±0.5	73.0% ±<0.1	57.4% ±<0.1
Black alone, not Hispanic	2,336 ±236	2.6% ±0.3	10.3% ±<0.1	11.9% ±<0.1
Asian alone, not Hispanic	363 ±86	0.4% ±0.1	3.8% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	0 to 18	0% to < 0.1%	0.1% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 28	0% to < 0.1%	< 0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	186 to 666	0.2% to 0.7%	0.5% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	2,363 ±421	2.6% ±0.5	3.6% ±0.1	4.3% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Place of birth and citizenship

“Born a citizen outside the states” counts people born in Puerto Rico, the island areas, or abroad to American parents. Naturalized citizens and those who are not citizens together make up the people born abroad (B05002).

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People in Northumberland County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Pennsylvania	United States
Born in the state	77,075 ±710	85.1% ±0.8	70.6% ±0.1	57.3% ±<0.1
Born in another state	10,934 ±750	12.1% ±0.8	19.8% ±0.1	26.9% ±<0.1
Born a citizen outside the states	1,110 ±297	1.2% ±0.3	1.9% ±<0.1	1.7% ±<0.1
Born abroad	1,441 ±351	1.6% ±0.4	7.7% ±0.1	14.1% ±<0.1
Naturalized citizens	771 ±208	0.9% ±0.2	4.3% ±0.1	7.4% ±<0.1
Not citizens	670 ±295	0.7% ±0.3	3.4% ±0.1	6.8% ±<0.1

Northumberland County among the counties of Pennsylvania

32nd of 67 by population, July 2025. Every one is listed on the Pennsylvania page.

Counties of Pennsylvania near Northumberland County in population, July 2025
County	July 2025	Change since 2020
Fayette County	123,021	−4.3%
Blair County	119,541	−2.5%
Lycoming County	112,587	−1.3%
Mercer County	107,860	−2.4%
Adams County	107,594	+3.6%
Northumberland County	89,920	−1.8%
Lawrence County	83,911	−2.4%
Indiana County	82,878	−0.3%
Crawford County	81,792	−2.4%
Clearfield County	78,100	−2.9%
Somerset County	72,004	−2.7%

Elsewhere on the site

Rankings this appears in

No. 6 Counties in Pennsylvania by poverty rate
No. 17 Counties in Pennsylvania by homeownership rate
No. 20 Counties in Pennsylvania by Hispanic or Latino share
No. 23 Counties in Pennsylvania by median age
No. 31 Counties in Pennsylvania by foreign-born share
No. 32 Counties by population in Pennsylvania

Sources

Census Bureau population estimates — counties and Puerto Rico municipios, with components of change — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
American Community Survey 5-year estimates — table-based Summary File · U.S. Government work

Compiled automatically from Census Bureau population estimates — counties and Puerto Rico municipios, with components of change and American Community Survey 5-year estimates — table-based Summary File by a checked SQL query · Editor: Kian O'Connor · How this site is built

Data retrieved September 25, 2026