Augusta, ME has a population of 18,691 and is the 2,337th largest city in the United States. The population density is 339 per sq mi which is 803% higher than the Maine average and 274% higher than the national average. The median age in Augusta is 44 which is approximately 1% lower than the Maine average of 44. In Augusta, 48% of the population over 15 years of age are married, 91% speak English and 1% speak Spanish. 74% of Augusta residents were born in Maine, 20% were born out of state, 1% were born outside of the United States and 4% were foreign born.