Noblesville, IN has a population of 58,719 and is the 673rd largest city in the United States. The population density is 1,826 per sq mi which is 917% higher than the Indiana average and 1915% higher than the national average. The median age in Noblesville is 33 which is approximately 11% lower than the Indiana average of 37. In Noblesville, 63% of the population over 15 years of age are married, 93% speak English and 3% speak Spanish. 62% of Noblesville residents were born in Indiana, 33% were born out of state, 1% were born outside of the United States and 4% were foreign born.