Genesee, ID has a population of 951 and is the 15,462nd largest city in the United States. The population density is 1,549 per sq mi which is 8020% higher than the Idaho average and 1610% higher than the national average. The median age in Genesee is 37 which is approximately 2% higher than the Idaho average of 36. In Genesee, 70% of the population over 15 years of age are married, 97% speak English and 1% speak Spanish. 52% of Genesee residents were born in Idaho, 46% were born out of state, 0% were born outside of the United States and 2% were foreign born.