Moscow, ID has a population of 24,855 and is the 1,745th largest city in the United States. The population density is 3,597 per sq mi which is 18754% higher than the Idaho average and 3871% higher than the national average. The median age in Moscow is 25 which is approximately 31% lower than the Idaho average of 36. In Moscow, 40% of the population over 15 years of age are married, 91% speak English and 3% speak Spanish. 37% of Moscow residents were born in Idaho, 55% were born out of state, 1% were born outside of the United States and 7% were foreign born.