Ruby, AK has a population of 214 and is the 24,135th largest city in the United States. The population density is 30 per sq mi which is 2669% higher than the Alaska average and 66% lower than the national average. The median age in Ruby is 31 which is approximately 8% lower than the Alaska average of 34. In Ruby, 43% of the population over 15 years of age are married, 93% speak English and 0% speak Spanish. 91% of Ruby residents were born in Alaska, 9% were born out of state, 0% were born outside of the United States and 0% were foreign born.