Alexandria, MO has a population of 122 and is the 26,354th largest city in the United States. The population density is 324 per sq mi which is 275% higher than the Missouri average and 257% higher than the national average. The median age in Alexandria is 50 which is approximately 30% higher than the Missouri average of 38. In Alexandria, 62% of the population over 15 years of age are married, 99% speak English and 1% speak Spanish. 13% of Alexandria residents were born in Missouri, 87% were born out of state, 0% were born outside of the United States and 0% were foreign born.