Sterling, AK has a population of 5,661 and is the 5,973rd largest city in the United States. The population density is 73 per sq mi which is 6518% higher than the Alaska average and 20% lower than the national average. The median age in Sterling is 47 which is approximately 40% higher than the Alaska average of 34. In Sterling, 66% of the population over 15 years of age are married, 97% speak English and 1% speak Spanish. 30% of Sterling residents were born in Alaska, 67% were born out of state, 1% were born outside of the United States and 2% were foreign born.