Welcome to the fantastic area of Duncan! As of the latest US census, around 4,328 call this area home and around 59% are homeowners. With an average age of 33, Duncan has a dynamic, and energetic population. In any given day, you’ll see parents taking their kids to school, staying active in the nearby parks, or simply enjoying the hustle and bustle of Duncan. Over the past 30 days roughly 11 homes have been sold with an average sold price of $294,791. That is an increase of $31,083 from the previous period.