Filer, ID has a population of 2,640 and is the 9,494th largest city in the United States. The population density is 2,585 per sq mi which is 13446% higher than the Idaho average and 2753% higher than the national average. The median age in Filer is 32 which is approximately 12% lower than the Idaho average of 36. In Filer, 53% of the population over 15 years of age are married, 93% speak English and 6% speak Spanish. 61% of Filer residents were born in Idaho, 35% were born out of state, 0% were born outside of the United States and 4% were foreign born.