Eagle Rock, MO has a population of 160 and is the 25,408th largest city in the United States. The population density is 71 per sq mi which is 18% lower than the Missouri average and 22% lower than the national average. The median age in Eagle Rock is 55 which is approximately 42% higher than the Missouri average of 38. In Eagle Rock, 62% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 34% of Eagle Rock residents were born in Missouri, 66% were born out of state, 0% were born outside of the United States and 0% were foreign born.