Martin County Demographics

A map of Martin County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	121,241	119,216	74.8%	75.2%
Hispanic	25,843	24,187	15.9%	15.3%
Black	7,569	7,277	4.7%	4.6%
Multiracial	4,783	4,720	2.9%	3.0%
Asian	2,120	2,246	1.3%	1.4%
Native American/Other	620	785	0.4%	0.5%

Martin County, Florida has an estimated population of 162,176, a slight increase from the 158,431 recorded in the 2020 Census. The population is 74.8% White, 15.9% Hispanic, 4.7% Black, 2.9% Multiracial, 1.3% Asian, and 0.4% Native American/Other. 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 Florida 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 40.7% in 2020 and 41.3% in the most recent ACS estimates.

Martin County is ranked the 33rd most populous county in Florida, out of 67 counties. Martin County was ranked the 32nd most populous county in the 2020 Census.

Martin County's White Population

121,241 residents of Martin County, or 74.8% of the population, identify as White. The share of White residents in Martin County is significantly higher than in Florida overall, where 50.4% of the population is White. Martin County ranks 19th statewide in terms of White residents as a share of the population, out of 67 counties.

Since the 2020 Census, Martin County's White population has grown by an estimated 1.7%. White residents' share of Martin County's population has remained roughly unchanged at 74.8%.

Martin County is more White than neighboring St. Lucie County (51.1% White), Palm Beach County (49.6% White), Okeechobee County (61.8% White), Indian River County (72.5% White), and Glades County (54.6% White).

Martin County's Black Population

7,569 residents of Martin County, or 4.7% of the population, identify as Black. The share of Black residents in Martin County is lower than in Florida overall, where 14.6% of the population is Black. Martin County ranks 63rd statewide in terms of Black residents as a share of the population, out of 67 counties.

Since the 2020 Census, Martin County's Black population has grown by an estimated 4.0%. Black residents' share of Martin County's population has remained roughly unchanged at 4.7%.

Martin County is less Black than neighboring St. Lucie County (20.9% Black), Palm Beach County (18.1% Black), Okeechobee County (7.5% Black), Indian River County (7.7% Black), and Glades County (14.7% Black).

Martin County's Asian Population

2,120 residents of Martin County, or 1.3% of the population, identify as Asian. The share of Asian residents in Martin County is comparable to the share in Florida overall, where 2.9% of the population is Asian. Martin County ranks 33rd statewide in terms of Asian residents as a share of the population, out of 67 counties.

Since the 2020 Census, Martin County's Asian population has declined by an estimated 5.6%. Asian residents' share of Martin County's population has remained roughly unchanged at 1.3%.

Martin County is more Asian than neighboring Okeechobee County (0.7% Asian), and Glades County (0.5% Asian). Martin County is less Asian than neighboring St. Lucie County (2% Asian), Palm Beach County (2.8% Asian), and Indian River County (1.5% Asian).

Martin County's Hispanic Population

25,843 residents of Martin County, or 15.9% of the population, identify as Hispanic. The share of Hispanic residents in Martin County is considerably lower than in Florida overall, where 27.4% of the population is Hispanic. Martin County ranks 22nd statewide in terms of Hispanic residents as a share of the population, out of 67 counties.

Since the 2020 Census, Martin County's Hispanic population has grown by an estimated 6.8%. Hispanic residents' share of Martin County's population has increased from 15.3% to 15.9%.

Martin County is more Hispanic than neighboring Indian River County (13.9% Hispanic). Martin County is less Hispanic than neighboring St. Lucie County (21.8% Hispanic), Palm Beach County (24.4% Hispanic), Okeechobee County (26.1% Hispanic), and Glades County (25.7% Hispanic).

Martin County's Native American/Other Population

620 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 Florida overall, where 0.8% of the population is Native American/Other. Martin County ranks 62nd statewide in terms of Native American/Other residents as a share of the population, out of 67 counties.

Since the 2020 Census, Martin County's Native American/Other population has declined by an estimated 21.0%. Native American/Other residents' share of Martin County's population has remained roughly unchanged at 0.4%.

Martin County is less Native American/Other than neighboring St. Lucie County (0.7% Native American/Other), Palm Beach County (1% Native American/Other), Okeechobee County (0.7% Native American/Other), Indian River County (1% Native American/Other), and Glades County (3.5% Native American/Other).

Martin County's Multiracial Population

4,783 residents of Martin County, or 2.9% of the population, identify as Multiracial. The share of Multiracial residents in Martin County is comparable to the share in Florida overall, where 3.8% of the population is Multiracial. Martin County ranks 51st statewide in terms of Multiracial residents as a share of the population, out of 67 counties.

Since the 2020 Census, Martin County's Multiracial population has grown by an estimated 1.3%. Multiracial residents' share of Martin County's population has remained roughly unchanged at 2.9%.

Martin County is more Multiracial than neighboring Glades County (1.1% Multiracial). Martin County is less Multiracial than neighboring St. Lucie County (3.5% Multiracial), Palm Beach County (4.1% Multiracial), Okeechobee County (3.2% Multiracial), and Indian River County (3.5% 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.