Parnell, MO has a population of 183 and is the 24,859th largest city in the United States. The population density is 635 per sq mi which is 635% higher than the Missouri average and 601% higher than the national average. The median age in Parnell is 26 which is approximately 32% lower than the Missouri average of 38. In Parnell, 62% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 81% of Parnell residents were born in Missouri, 19% were born out of state, 0% were born outside of the United States and 0% were foreign born.