Gem County ID Information


Gem County Subdivisions

Gem County ID Data & Demographics (As of July 1, 2017)


Total Population 17,499
Daytime Population: Workers 3,878
Daytime Population: Residents 10,829
Total Daytime Population (TDP) 14,707
Ratio TDP/Total Population1 0.84
Population in Households 17,348
Population in Familes 14,426
Population in Group Qrtrs 151
Population Density2 31
Diversity Index3 28


Median Household Income $43,614
Average Household Income $56,435
Per Capita Income $22,061


Total Housing Units 7,380 (100%)
Owner Occupied HU 5,006 (67.8%)
Renter Occupied HU 1,763 (23.9%)
Vacant Housing Units 611 ( 8.3%)
Median Home Value $176,795
Average Home Value $222,578


Total Households 6,769
Average Household Size 2.56
Family Households 4,762
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. 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 0.63% 0.64%
Households 0.57% 0.61%
Families 0.45% 0.53%
Median Household Income   1.47%
Per Capita Income   2.26%


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, 2017 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 # 20 57th
Per Capita Income # 20 57th

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