Doniphan, MO has a population of 2,509 and is the 9,832nd largest city in the United States. The population density is 1,823 per sq mi which is 2010% higher than the Missouri average and 1912% higher than the national average. The median age in Doniphan is 36 which is approximately 5% lower than the Missouri average of 38. In Doniphan, 60% of the population over 15 years of age are married, 96% speak English and 1% speak Spanish. 64% of Doniphan residents were born in Missouri, 33% were born out of state, 1% were born outside of the United States and 2% were foreign born.