Murphy, ID has a population of 113 and is the 26,596th largest city in the United States. The population density is 28 per sq mi which is 48% higher than the Idaho average and 69% lower than the national average. The median age in Murphy is 51 which is approximately 43% higher than the Idaho average of 36. In Murphy, 53% of the population over 15 years of age are married, 89% speak English and 5% speak Spanish. 14% of Murphy residents were born in Idaho, 72% were born out of state, 0% were born outside of the United States and 14% were foreign born.