Martin County Demographics

A map of Martin County's Population by Race

Martin County, Minnesota has an estimated population of 19,780, a slight decrease from the 20,025 recorded in the 2020 Census. The population is 88.2% White, 7.2% Hispanic, 2.1% Multiracial, 1.2% Native American/Other, 0.9% Black, and 0.5% Asian. This demographic dot map shows the population of Martin County, with one dot drawn for each person counted by the Census, color-coded by race.

Martin has become more racially diverse since the 2020 Census. It is considerably less diverse than Minnesota overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Martin County, that probability was 19.2% in 2020 and 21.7% in the most recent ACS estimates.

Martin County is ranked the 49th most populous county in Minnesota, out of 87 counties. Martin County was ranked the 49th most populous county in the 2020 Census.

Martin County's White Population

17,437 residents of Martin County, or 88.2% of the population, identify as White. The share of White residents in Martin County is considerably higher than in Minnesota overall, where 75.9% of the population is White. Martin County ranks 32nd statewide in terms of White residents as a share of the population, out of 87 counties.

Since the 2020 Census, Martin County's White population has declined by an estimated 2.8%. White residents' share of Martin County's population has decreased from 89.6% to 88.2%.

Martin County is more White than neighboring Watonwan County (67.7% White), and Emmet County (85.2% White). Martin County is less White than neighboring Kossuth County (91.7% White), Brown County (91.4% White), and Jackson County (89.8% White).

Martin County's Black Population

169 residents of Martin County, or 0.9% of the population, identify as Black. The share of Black residents in Martin County is lower than in Minnesota overall, where 6.9% of the population is Black. Martin County ranks 51st statewide in terms of Black residents as a share of the population, out of 87 counties.

Since the 2020 Census, Martin County's Black population has grown by an estimated 50.9%. Black residents' share of Martin County's population has remained roughly unchanged at 0.9%.

Martin County is more Black than neighboring Watonwan County (0% Black), Kossuth County (0.7% Black), and Jackson County (0.5% Black). Martin County is less Black than neighboring Emmet County (1.6% Black).

Martin County's Asian Population

101 residents of Martin County, or 0.5% of the population, identify as Asian. The share of Asian residents in Martin County is slightly lower than in Minnesota overall, where 5.1% of the population is Asian. Martin County ranks 57th statewide in terms of Asian residents as a share of the population, out of 87 counties.

Since the 2020 Census, Martin County's Asian population has grown by an estimated 9.8%. Asian residents' share of Martin County's population has remained roughly unchanged at 0.5%.

Martin County is more Asian than neighboring Watonwan County (0.3% Asian), Emmet County (0.2% Asian), and Kossuth County (0.4% Asian). Martin County is less Asian than neighboring Jackson County (1.3% Asian).

Martin County's Hispanic Population

1,421 residents of Martin County, or 7.2% of the population, identify as Hispanic. The share of Hispanic residents in Martin County is comparable to the share in Minnesota overall, where 6.4% of the population is Hispanic. Martin County ranks 23rd statewide in terms of Hispanic residents as a share of the population, out of 87 counties.

Since the 2020 Census, Martin County's Hispanic population has grown by an estimated 7.7%. Hispanic residents' share of Martin County's population has increased from 6.6% to 7.2%.

Martin County is more Hispanic than neighboring Kossuth County (4.5% Hispanic), Brown County (5.1% Hispanic), and Jackson County (4.9% Hispanic). Martin County is less Hispanic than neighboring Watonwan County (30.4% Hispanic), and Emmet County (10.2% Hispanic).

Martin County's Native American/Other Population

241 residents of Martin County, or 1.2% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Martin County is comparable to the share in Minnesota overall, where 1.2% of the population is Native American/Other. Martin County ranks 75th statewide in terms of Native American/Other residents as a share of the population, out of 87 counties.

Since the 2020 Census, Martin County's Native American/Other population has grown by an estimated 186.9%. Native American/Other residents' share of Martin County's population has increased from 0.4% to 1.2%.

Martin County is more Native American/Other than neighboring Watonwan County (0.5% Native American/Other), Emmet County (0.6% Native American/Other), Kossuth County (0.3% Native American/Other), Brown County (0.7% Native American/Other), and Jackson County (0.2% Native American/Other).

Martin County's Multiracial Population

411 residents of Martin County, or 2.1% of the population, identify as Multiracial. The share of Multiracial residents in Martin County is slightly lower than in Minnesota overall, where 4.5% of the population is Multiracial. Martin County ranks 75th statewide in terms of Multiracial residents as a share of the population, out of 87 counties.

Since the 2020 Census, Martin County's Multiracial population has declined by an estimated 12.6%. Multiracial residents' share of Martin County's population has remained roughly unchanged at 2.1%.

Martin County is more Multiracial than neighboring Watonwan County (1.2% Multiracial), and Brown County (1.4% Multiracial). Martin County is less Multiracial than neighboring Kossuth County (2.4% Multiracial), and Jackson County (3.3% 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.