As of 2026 the population of Martin County is 5,223. The population is expected to grow to 5,236 by 2031 - a growth rate of 0.05%.
The median age of Martin County residents is 37.
The diversity index of Martin County is 76.4, meaning that there is a 76% chance that any two people selected out of 100 residents will be of different race or ethnicity from one another.
The average household income in Martin County is $103,445 and projected to be $114,538 in 2031. Per capita income is $37,867, projected to be $42,741 in 2031. 3.01% of households – 157 – have an income of $200,000 or higher. Average net worth is $899,517 and the average disposable income is $82,489.
There are 2,162 housing units in Martin County; 1,420 are owner-occupied, 491 are rented, and 251 are vacant. The average home value is $284,738, with 373 homes built in 2010 or later, and 140 built in 1939 or earlier.
There are 188 businesses in Martin County, employing 1,640 workers and pulling from a labor force of 2,347 age 16 and above. 926 workers commute into Martin County from outside the county or state. Key industries for the area include:
1,421 residents both live and work in/around Martin County. The average travel time is 0.0 minutes. 24.84% people have a commute of less than 5 minutes while 4.01% commute 90 minutes or more each way. Of commuters, 1,901 drive alone, 321 carpool, and 17 take public transportation. 100 use other modes of transport such as motorcycle, bicycle, walking, etc. 8 residents work from home.
1,174 members of the workforce hold a high school diploma or GED. 249 have associates degrees, 621 have bachelor’s degrees, and 96 hold a graduate or professional degree.
Source: ESRI, 2026-09-09
