Plymouth County Demographics

A map of Plymouth County's Population by Race

Plymouth County, Massachusetts had a population of 530,819 in 2020. It was 76.7% White, 8.2% Black, 1.4% Asian, 4.5% Hispanic, 2.4% Native American/Other, and 6.8% Multiracial. This map presents the population of Plymouth County, with one dot drawn for each person counted in the 2020 Census, color-coded by race.

Plymouth County is the 7th most populous county of the 14 counties in Massachusetts.

Plymouth County's White Population

406,919 residents of Plymouth County identify as White, or 76.7%. This makes the White share of the population of Plymouth County slightly larger than the White share of the population of Massachusetts (67.6% White). Of the 14 counties in Massachusetts, Plymouth County is ranked #7 in terms of White residents as a share of the population.

Plymouth County is more White than neighboring Suffolk County (44.2% White), and Norfolk County (70.6% White). Plymouth County is less White than neighboring Bristol County (76.9% White), Barnstable County (85% White), and Dukes County (78.8% White).

Plymouth County's Black Population

43,482 residents of Plymouth County identify as Black, or 8.2%. This makes the Black share of the population of Plymouth County roughly similar to the Black share of the population of Massachusetts (6.5% Black). Of the 14 counties in Massachusetts, Plymouth County is ranked #2 in terms of Black residents as a share of the population.

Plymouth County is more Black than neighboring Bristol County (4% Black), Norfolk County (6.8% Black), Barnstable County (2.8% Black), and Dukes County (3.9% Black). Plymouth County is less Black than neighboring Suffolk County (17% Black).

Plymouth County's Asian Population

7,693 residents of Plymouth County identify as Asian, or 1.4%. This makes the Asian share of the population of Plymouth County slightly less than the Asian share of the population of Massachusetts (7.2% Asian). Of the 14 counties in Massachusetts, Plymouth County is ranked #12 in terms of Asian residents as a share of the population.

Plymouth County is more Asian than neighboring Dukes County (0.9% Asian). Plymouth County is less Asian than neighboring Bristol County (2.4% Asian), Suffolk County (10.1% Asian), and Norfolk County (12.2% Asian).

Plymouth County's Hispanic Population

23,952 residents of Plymouth County identify as Hispanic, or 4.5%. This makes the Hispanic share of the population of Plymouth County slightly less than the Hispanic share of the population of Massachusetts (12.6% Hispanic). Of the 14 counties in Massachusetts, Plymouth County is ranked #12 in terms of Hispanic residents as a share of the population.

Plymouth County is more Hispanic than neighboring Barnstable County (3.5% Hispanic), and Dukes County (2.6% Hispanic). Plymouth County is less Hispanic than neighboring Bristol County (9.5% Hispanic), Suffolk County (22.4% Hispanic), and Norfolk County (5.2% Hispanic).

Plymouth County's Native American/Other Population

12,856 residents of Plymouth County identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other, or 2.4%. This makes the Native American/Other share of the population of Plymouth County roughly similar to the Native American/Other share of the population of Massachusetts (1.5% Native American/Other). Of the 14 counties in Massachusetts, Plymouth County is ranked #2 in terms of Native American/Other residents as a share of the population.

Plymouth County is more Native American/Other than neighboring Bristol County (1.7% Native American/Other), Suffolk County (1.6% Native American/Other), Norfolk County (1.1% Native American/Other), and Barnstable County (2% Native American/Other). Plymouth County is less Native American/Other than neighboring Dukes County (4.4% Native American/Other).

Plymouth County's Multiracial Population

35,917 residents of Plymouth County identify as Multiracial, or 6.8%. This makes the Multiracial share of the population of Plymouth County roughly similar to the Multiracial share of the population of Massachusetts (4.7% Multiracial). Of the 14 counties in Massachusetts, Plymouth County is ranked #2 in terms of Multiracial residents as a share of the population.

Plymouth County is more Multiracial than neighboring Bristol County (5.6% Multiracial), Suffolk County (4.7% Multiracial), Norfolk County (4.1% Multiracial), and Barnstable County (5.4% Multiracial). Plymouth County is less Multiracial than neighboring Dukes County (9.4% Multiracial).

Source: 2020 Census State Redistricting Data and Census TIGER/Line Shapefiles.