Napier Field, AL has a population of 512 and is the 19,389th largest city in the United States. The population density is 2,002 per sq mi which is 2076% higher than the Alabama average and 2109% higher than the national average. The median age in Napier Field is 34 which is approximately 13% lower than the Alabama average of 39. In Napier Field, 59% of the population over 15 years of age are married, 92% speak English and 7% speak Spanish. 54% of Napier Field residents were born in Alabama, 41% were born out of state, 3% were born outside of the United States and 3% were foreign born.