As of 2026 the population of Jefferson County is 13,138. The population is expected to grow to 13,750 by 2031 - a growth rate of 0.91%.
The median age of Jefferson County residents is 49.
The diversity index of Jefferson County is 24.3, meaning that there is a 24% 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 Jefferson County is $129,388 and projected to be $149,912 in 2031. Per capita income is $53,086, projected to be $61,743 in 2031. 7.5% of households – 986 – have an income of $200,000 or higher. Average net worth is $2,162,034 and the average disposable income is $97,146.
There are 5,822 housing units in Jefferson County; 4,552 are owner-occupied, 819 are rented, and 451 are vacant. The average home value is $540,462, with 758 homes built in 2010 or later, and 547 built in 1939 or earlier.
There are 473 businesses in Jefferson County, employing 2,582 workers and pulling from a labor force of 6,006 age 16 and above. 3,429 workers commute into Jefferson County from outside the county or state. Key industries for the area include:
2,478 residents both live and work in/around Jefferson County. The average travel time is 24.4 minutes. 11.66% people have a commute of less than 5 minutes while 7.87% commute 90 minutes or more each way. Of commuters, 4,479 drive alone, 564 carpool, and 0 take public transportation. 201 use other modes of transport such as motorcycle, bicycle, walking, etc. 762 residents work from home.
2,761 members of the workforce hold a high school diploma or GED. 1,310 have associates degrees, 2,114 have bachelor’s degrees, and 1,210 hold a graduate or professional degree.
Source: ESRI, 2026-08-31
