Octa, OH has a population of 34 and is the 28,520th largest city in the United States. The population density is 117 per sq mi which is 54% lower than the Ohio average and 29% higher than the national average. The median age in Octa is 63 which is approximately 59% higher than the Ohio average of 39. In Octa, 59% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 88% of Octa residents were born in Ohio, 12% were born out of state, 0% were born outside of the United States and 0% were foreign born.