Martin County Demographics

A map of Martin County's Population by Race

Martin County, Indiana has an estimated population of 9,830, a less than 1% change from the 9,812 recorded in the 2020 Census. The population is 94.6% White, 3.0% Multiracial, 1.4% Hispanic, 0.4% Black, 0.4% Native American/Other, and 0.1% 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 slightly more racially diverse since the 2020 Census. It is considerably less diverse than Indiana 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 9.4% in 2020 and 10.3% in the most recent ACS estimates.

Martin County is ranked the 88th most populous county in Indiana, out of 92 counties. Martin County was ranked the 87th most populous county in the 2020 Census.

Martin County's White Population

9,303 residents of Martin County, or 94.6% of the population, identify as White. The share of White residents in Martin County is significantly higher than in Indiana overall, where 75.4% of the population is White. Martin County ranks 5th statewide in terms of White residents as a share of the population, out of 92 counties.

Since the 2020 Census, Martin County's White population has remained roughly the same. White residents' share of Martin County's population has decreased from 95.1% to 94.6%.

Martin County is more White than neighboring Daviess County (87.4% White), Lawrence County (93.3% White), Orange County (93.3% White), and Dubois County (86.9% White). Martin County is less White than neighboring Greene County (95.2% White).

Martin County's Black Population

35 residents of Martin County, or 0.4% of the population, identify as Black. The share of Black residents in Martin County is lower than in Indiana overall, where 9.1% of the population is Black. Martin County ranks 88th statewide in terms of Black residents as a share of the population, out of 92 counties.

Since the 2020 Census, Martin County's Black population has grown by an estimated 75.0%. Black residents' share of Martin County's population has remained roughly unchanged at 0.4%.

Martin County is more Black than neighboring Lawrence County (0.2% Black). Martin County is less Black than neighboring Daviess County (1.6% Black), Orange County (1.2% Black), Dubois County (0.8% Black), and Greene County (0.5% Black).

Martin County's Asian Population

12 residents of Martin County, or 0.1% of the population, identify as Asian. The share of Asian residents in Martin County is slightly lower than in Indiana overall, where 2.6% of the population is Asian. Martin County ranks 68th statewide in terms of Asian residents as a share of the population, out of 92 counties.

Since the 2020 Census, Martin County's Asian population has declined by an estimated 63.6%. Asian residents' share of Martin County's population has remained roughly unchanged at 0.1%.

Martin County is less Asian than neighboring Daviess County (0.3% Asian), Lawrence County (0.6% Asian), Orange County (0.5% Asian), Dubois County (0.5% Asian), and Greene County (0.2% Asian).

Martin County's Hispanic Population

142 residents of Martin County, or 1.4% of the population, identify as Hispanic. The share of Hispanic residents in Martin County is lower than in Indiana overall, where 8.6% of the population is Hispanic. Martin County ranks 92nd statewide in terms of Hispanic residents as a share of the population, out of 92 counties.

Since the 2020 Census, Martin County's Hispanic population has grown by an estimated 54.3%. Hispanic residents' share of Martin County's population has remained roughly unchanged at 1.4%.

Martin County is less Hispanic than neighboring Daviess County (6.5% Hispanic), Lawrence County (2% Hispanic), Orange County (1.8% Hispanic), Dubois County (10% Hispanic), and Greene County (2.1% Hispanic).

Martin County's Native American/Other Population

43 residents of Martin County, or 0.4% 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 Indiana overall, where 0.5% of the population is Native American/Other. Martin County ranks 66th statewide in terms of Native American/Other residents as a share of the population, out of 92 counties.

Since the 2020 Census, Martin County's Native American/Other population has grown by an estimated 16.2%. Native American/Other residents' share of Martin County's population has remained roughly unchanged at 0.4%.

Martin County is more Native American/Other than neighboring Orange County (0.2% Native American/Other), Dubois County (0.3% Native American/Other), and Greene County (0.2% Native American/Other). Martin County is less Native American/Other than neighboring Daviess County (0.6% Native American/Other), and Lawrence County (0.8% Native American/Other).

Martin County's Multiracial Population

295 residents of Martin County, or 3.0% of the population, identify as Multiracial. The share of Multiracial residents in Martin County is comparable to the share in Indiana overall, where 3.8% of the population is Multiracial. Martin County ranks 53rd statewide in terms of Multiracial residents as a share of the population, out of 92 counties.

Since the 2020 Census, Martin County's Multiracial population has remained roughly the same. Multiracial residents' share of Martin County's population has remained roughly unchanged at 3.0%.

Martin County is more Multiracial than neighboring Dubois County (1.5% Multiracial), and Greene County (1.8% Multiracial). Martin County is less Multiracial than neighboring Daviess County (3.7% Multiracial), Lawrence County (3.1% Multiracial), and Orange County (3.1% 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.