Gem County ID Information


Gem County Subdivisions

Gem County ID Data & Demographics (As of July 1, 2018)


Total Population 17,925
Population in Households 17,774
Population in Familes 14,827
Population in Group Qrtrs 151
Population Density1 32
Diversity Index2 28


Median Household Income $46,989
Average Household Income $57,624
Per Capita Income $22,468


Total Housing Units 7,485 (100%)
Owner Occupied HU 4,664 (62.3%)
Renter Occupied HU 2,255 (30.1%)
Vacant Housing Units 566 ( 7.6%)
Median Home Value $191,166
Average Home Value $241,702


Total Households 6,919
Average Household Size 2.57
Family Households 4,840
Average Family Size 3
  1. Population Density = Total Population per square mile.
  2. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population 0.85% 1.04%
Households 0.77% 0.99%
Families 0.59% 0.88%
Median Household Income   2.69%
Per Capita Income   3.28%


Gem County ID - Peer Comparisons by Rank and Percentile

The table below compares Gem County to the other 44 counties and county equivalents in Idaho by rank and percentile using July 1, 2018 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 19 59th
Population Density # 12 75th
Diversity Index # 25 45th
Median Household Income # 21 55th
Per Capita Income # 24 48th

Additional comparisons and rankings can be made with a VERY EASY TO USE Idaho Census Data Comparison Tool.