Northwood, OH has a population of 5,337 and is the 6,182nd largest city in the United States. The population density is 626 per sq mi which is 143% higher than the Ohio average and 591% higher than the national average. The median age in Northwood is 42 which is approximately 6% higher than the Ohio average of 39. In Northwood, 69% of the population over 15 years of age are married, 97% speak English and 0% speak Spanish. 79% of Northwood residents were born in Ohio, 20% were born out of state, 0% were born outside of the United States and 1% were foreign born.