New River, AZ has a population of 15,305 and is the 2,786th largest city in the United States. The population density is 273 per sq mi which is 374% higher than the Arizona average and 201% higher than the national average. The median age in New River is 49 which is approximately 33% higher than the Arizona average of 37. In New River, 67% of the population over 15 years of age are married, 94% speak English and 3% speak Spanish. 34% of New River residents were born in Arizona, 60% were born out of state, 1% were born outside of the United States and 5% were foreign born.