As of 2026 the population of Jerome County, ID is 26,256. The population is expected to grow to 27,453 by 2031 - a growth rate of 0.90%.
The median age of Jerome County, ID residents is 34.
The diversity index of Jerome County, ID is 75.3, meaning that there is a 75% 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 Jerome County, ID is $92,264 and projected to be $108,062 in 2031. Per capita income is $31,455, projected to be $37,093 in 2031. 2.13% of households – 558 – have an income of $200,000 or higher. Average net worth is $822,355 and the average disposable income is $70,392.
There are 9,307 housing units in Jerome County, ID; 6,235 are owner-occupied, 2,669 are rented, and 403 are vacant. The average home value is $398,023, with 1,326 homes built in 2010 or later, and 721 built in 1939 or earlier.
There are 810 businesses in Jerome County, ID, employing 9,302 workers and pulling from a labor force of 11,535 age 16 and above. 4,347 workers commute into Jerome County, ID from outside the county or state. Key industries for the area include:
6,925 residents both live and work in/around Jerome County, ID. The average travel time is 21.7 minutes. 5.76% people have a commute of less than 5 minutes while 3.6% commute 90 minutes or more each way. Of commuters, 9,298 drive alone, 1,307 carpool, and 6 take public transportation. 251 use other modes of transport such as motorcycle, bicycle, walking, etc. 673 residents work from home.
4,694 members of the workforce hold a high school diploma or GED. 1,965 have associates degrees, 1,836 have bachelor’s degrees, and 693 hold a graduate or professional degree.
Source: ESRI, 2026-08-31
