Las Vegas, NV has a population of 613,295 and is the 29th largest city in the United States. The population density is 4,551 per sq mi which is 18142% higher than the Nevada average and 4924% higher than the national average. The median age in Las Vegas is 37 which is approximately equal to the Nevada average of 38. In Las Vegas, 48% of the population over 15 years of age are married, 67% speak English and 25% speak Spanish. 25% of Las Vegas residents were born in Nevada, 52% were born out of state, 2% were born outside of the United States and 21% were foreign born.