Salmon, ID has a population of 3,059 and is the 8,721st largest city in the United States. The population density is 1,221 per sq mi which is 6300% higher than the Idaho average and 1248% higher than the national average. The median age in Salmon is 41 which is approximately 16% higher than the Idaho average of 36. In Salmon, 57% of the population over 15 years of age are married, 96% speak English and 1% speak Spanish. 43% of Salmon residents were born in Idaho, 54% were born out of state, 1% were born outside of the United States and 2% were foreign born.