The 2016 Willoughby, Ohio, population is 22,631. There are 2,208 people per square mile (population density).
The median age is 43.4. The US median is 37.4. 46.71% of people in Willoughby, Ohio, are married. 13.95% are divorced.
The average household size is 2.11 people. 24.80% of people are married, with children. 13.44% have children, but are single.
90.78% of people are white, 4.15% are black, 2.49% are asian, 0.10% are native american, and 0.00% claim 'Other'.
1.61% of the people in Willoughby, Ohio, claim hispanic ethnicity (meaning 98.39% are non-hispanic).
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