In the friendly area of Sullivan County, TN you’ll be in good company with around 160,308 residents with around 72% of those homeowners. With an average age of 45, the residents of Sullivan County, TN are well established, made up of families of all age groups. Though fairly kicked back throughout the week, during weekends and holidays, you can see a lot more activity and excitement. Over the recent months roughly 963 homes have been sold with an average sold price of $272,133. That is an increase of $40,306 from the previous period.