Oro Valley, AZ has a population of 42,379 and is the 967th largest city in the United States. The population density is 1,189 per sq mi which is 1969% higher than the Arizona average and 1213% higher than the national average. The median age in Oro Valley is 52 which is approximately 40% higher than the Arizona average of 37. In Oro Valley, 67% of the population over 15 years of age are married, 89% speak English and 6% speak Spanish. 23% of Oro Valley residents were born in Arizona, 68% were born out of state, 2% were born outside of the United States and 7% were foreign born.