Opelika, AL has a population of 29,030 and is the 1,476th largest city in the United States. The population density is 487 per sq mi which is 402% higher than the Alabama average and 437% higher than the national average. The median age in Opelika is 36 which is approximately 6% lower than the Alabama average of 39. In Opelika, 54% of the population over 15 years of age are married, 94% speak English and 4% speak Spanish. 70% of Opelika residents were born in Alabama, 24% were born out of state, 1% were born outside of the United States and 5% were foreign born.