Northumberland County Demographics

A map of Northumberland County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	80,361	81,689	88.7%	89.1%
Hispanic	4,702	4,151	5.2%	4.5%
Multiracial	2,363	2,638	2.6%	2.9%
Black	2,336	2,392	2.6%	2.6%
Native American/Other	435	333	0.5%	0.4%
Asian	363	444	0.4%	0.5%

Northumberland County, Pennsylvania has an estimated population of 90,560, a slight decrease from the 91,647 recorded in the 2020 Census. The population is 88.7% White, 5.2% Hispanic, 2.6% Black, 2.6% Multiracial, 0.5% Native American/Other, and 0.4% Asian. This demographic dot map shows the population of Northumberland County, with one dot drawn for each person counted by the Census, color-coded by race.

Northumberland has become slightly more racially diverse since the 2020 Census. It is considerably less diverse than Pennsylvania overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Northumberland County, that probability was 20.2% in 2020 and 20.8% in the most recent ACS estimates.

Northumberland County is ranked the 32nd most populous county in Pennsylvania, out of 67 counties. Northumberland County was ranked the 32nd most populous county in the 2020 Census.

Northumberland County's White Population

80,361 residents of Northumberland County, or 88.7% of the population, identify as White. The share of White residents in Northumberland County is significantly higher than in Pennsylvania overall, where 73% of the population is White. Northumberland County ranks 35th statewide in terms of White residents as a share of the population, out of 67 counties.

Since the 2020 Census, Northumberland County's White population has declined by an estimated 1.6%. White residents' share of Northumberland County's population has remained roughly unchanged at 88.7%.

Northumberland County is more White than neighboring Union County (86% White), and Dauphin County (60.6% White). Northumberland County is less White than neighboring Montour County (89% White), Columbia County (90.5% White), and Snyder County (93.8% White).

Northumberland County's Black Population

2,336 residents of Northumberland County, or 2.6% of the population, identify as Black. The share of Black residents in Northumberland County is lower than in Pennsylvania overall, where 10.3% of the population is Black. Northumberland County ranks 35th statewide in terms of Black residents as a share of the population, out of 67 counties.

Since the 2020 Census, Northumberland County's Black population has declined by an estimated 2.3%. Black residents' share of Northumberland County's population has remained roughly unchanged at 2.6%.

Northumberland County is more Black than neighboring Montour County (2.4% Black), Columbia County (1.7% Black), and Snyder County (0.7% Black). Northumberland County is less Black than neighboring Union County (5.7% Black), and Dauphin County (16.3% Black).

Northumberland County's Asian Population

363 residents of Northumberland County, or 0.4% of the population, identify as Asian. The share of Asian residents in Northumberland County is slightly lower than in Pennsylvania overall, where 3.8% of the population is Asian. Northumberland County ranks 43rd statewide in terms of Asian residents as a share of the population, out of 67 counties.

Since the 2020 Census, Northumberland County's Asian population has declined by an estimated 18.2%. Asian residents' share of Northumberland County's population has remained roughly unchanged at 0.4%.

Northumberland County is less Asian than neighboring Montour County (3.4% Asian), Columbia County (0.7% Asian), Union County (1.8% Asian), Snyder County (0.7% Asian), and Dauphin County (6.5% Asian).

Northumberland County's Hispanic Population

4,702 residents of Northumberland County, or 5.2% of the population, identify as Hispanic. The share of Hispanic residents in Northumberland County is slightly lower than in Pennsylvania overall, where 8.7% of the population is Hispanic. Northumberland County ranks 25th statewide in terms of Hispanic residents as a share of the population, out of 67 counties.

Since the 2020 Census, Northumberland County's Hispanic population has grown by an estimated 13.3%. Hispanic residents' share of Northumberland County's population has increased from 4.5% to 5.2%.

Northumberland County is more Hispanic than neighboring Montour County (3.1% Hispanic), Columbia County (4.1% Hispanic), Union County (5.1% Hispanic), and Snyder County (2.6% Hispanic). Northumberland County is less Hispanic than neighboring Dauphin County (11.8% Hispanic).

Northumberland County's Native American/Other Population

435 residents of Northumberland County, or 0.5% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Northumberland County is comparable to the share in Pennsylvania overall, where 0.6% of the population is Native American/Other. Northumberland County ranks 46th statewide in terms of Native American/Other residents as a share of the population, out of 67 counties.

Since the 2020 Census, Northumberland County's Native American/Other population has grown by an estimated 30.6%. Native American/Other residents' share of Northumberland County's population has remained roughly unchanged at 0.5%.

Northumberland County is more Native American/Other than neighboring Montour County (0.2% Native American/Other), and Union County (0.4% Native American/Other). Northumberland County is less Native American/Other than neighboring Columbia County (0.7% Native American/Other), and Dauphin County (0.7% Native American/Other).

Northumberland County's Multiracial Population

2,363 residents of Northumberland County, or 2.6% of the population, identify as Multiracial. The share of Multiracial residents in Northumberland County is comparable to the share in Pennsylvania overall, where 3.6% of the population is Multiracial. Northumberland County ranks 48th statewide in terms of Multiracial residents as a share of the population, out of 67 counties.

Since the 2020 Census, Northumberland County's Multiracial population has declined by an estimated 10.4%. Multiracial residents' share of Northumberland County's population has remained roughly unchanged at 2.6%.

Northumberland County is more Multiracial than neighboring Montour County (1.8% Multiracial), Columbia County (2.3% Multiracial), Union County (1.1% Multiracial), and Snyder County (1.7% Multiracial). Northumberland County is less Multiracial than neighboring Dauphin County (4.1% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.