Rochester, PA Demographics

A map of Rochester's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	2,835	2,509	82.8%	72.3%
Black	377	562	11.0%	16.2%
Multiracial	159	272	4.6%	7.8%
Asian	32	9	0.9%	0.3%
Hispanic	19	90	0.6%	2.6%
Native American/Other	0	30	0.0%	0.9%

Rochester, Pennsylvania has an estimated population of 3,422, a slight decrease from the 3,472 recorded in the 2020 Census. The population is 82.8% White, 11.0% Black, 4.6% Multiracial, 0.9% Asian, 0.6% Hispanic, and 0.0% Native American/Other. This demographic dot map shows the population of Rochester, with one dot drawn for each person counted by the Census, color-coded by race.

Rochester has become considerably less 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 Rochester, that probability was 44.5% in 2020 and 29.9% in the most recent ACS estimates.

Rochester is ranked the 416th most populous place in Pennsylvania, out of 2,002 places. This ranking is based on the Census definition of a place, which includes incorporated places like cities, towns, and villages, as well as unincorporated census-designated places (CDPs). Rochester was ranked the 402nd most populous place in the 2020 Census.

Rochester's White Population

2,835 residents of Rochester, or 82.8% of the population, identify as White. The share of White residents in Rochester is higher than in Pennsylvania overall, where 73% of the population is White. Rochester ranks 1704th statewide in terms of White residents as a share of the population, out of 2,002 places.

Since the 2020 Census, Rochester's White population has grown by an estimated 13.0%. White residents' share of Rochester's population has increased from 72.3% to 82.8%.

Rochester is more White than neighboring East Rochester (72.3% White). Rochester is less White than neighboring Bridgewater (85% White), Monaca (87.1% White), Beaver (94.2% White), and Freedom (90.5% White).

Rochester's Black Population

377 residents of Rochester, or 11.0% of the population, identify as Black. The share of Black residents in Rochester is comparable to the share in Pennsylvania overall, where 10.3% of the population is Black. Rochester ranks 93rd statewide in terms of Black residents as a share of the population, out of 2,002 places.

Since the 2020 Census, Rochester's Black population has declined by an estimated 32.9%. Black residents' share of Rochester's population has decreased from 16.2% to 11.0%.

Rochester is more Black than neighboring Bridgewater (5.4% Black), Monaca (1.1% Black), Beaver (1.3% Black), and Freedom (3.3% Black). Rochester is less Black than neighboring East Rochester (19.3% Black).

Rochester's Asian Population

32 residents of Rochester, or 0.9% of the population, identify as Asian. The share of Asian residents in Rochester is slightly lower than in Pennsylvania overall, where 3.8% of the population is Asian. Rochester ranks 1212th statewide in terms of Asian residents as a share of the population, out of 2,002 places.

Since the 2020 Census, Rochester's Asian population has grown by an estimated 255.6%. Asian residents' share of Rochester's population has increased from 0.3% to 0.9%.

Rochester is more Asian than neighboring East Rochester (0% Asian), Monaca (0.3% Asian), Beaver (0.3% Asian), and Freedom (0.1% Asian). Rochester is less Asian than neighboring Bridgewater (2.8% Asian).

Rochester's Hispanic Population

19 residents of Rochester, or 0.6% of the population, identify as Hispanic. The share of Hispanic residents in Rochester is lower than in Pennsylvania overall, where 8.7% of the population is Hispanic. Rochester ranks 856th statewide in terms of Hispanic residents as a share of the population, out of 2,002 places.

Since the 2020 Census, Rochester's Hispanic population has declined by an estimated 78.9%. Hispanic residents' share of Rochester's population has decreased from 2.6% to 0.6%.

Rochester is less Hispanic than neighboring East Rochester (6.7% Hispanic), Bridgewater (1.1% Hispanic), Monaca (4.5% Hispanic), Beaver (2.9% Hispanic), and Freedom (1.9% Hispanic).

Rochester's Native American/Other Population

0 residents of Rochester, or 0.0% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Rochester is comparable to the share in Pennsylvania overall, where 0.6% of the population is Native American/Other. Rochester ranks 252nd statewide in terms of Native American/Other residents as a share of the population, out of 2,002 places.

Since the 2020 Census, Rochester's Native American/Other population has declined by an estimated 100.0%. Native American/Other residents' share of Rochester's population has decreased from 0.9% to 0.0%.

Rochester is less Native American/Other than neighboring East Rochester (1.2% Native American/Other).

Rochester's Multiracial Population

159 residents of Rochester, or 4.6% of the population, identify as Multiracial. The share of Multiracial residents in Rochester is comparable to the share in Pennsylvania overall, where 3.6% of the population is Multiracial. Rochester ranks 47th statewide in terms of Multiracial residents as a share of the population, out of 2,002 places.

Since the 2020 Census, Rochester's Multiracial population has declined by an estimated 41.5%. Multiracial residents' share of Rochester's population has decreased from 7.8% to 4.6%.

Rochester is more Multiracial than neighboring East Rochester (0.5% Multiracial), Beaver (1.3% Multiracial), and Freedom (4.2% Multiracial). Rochester is less Multiracial than neighboring Bridgewater (5.6% Multiracial), and Monaca (7% 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.