In the friendly area of Sullivan County, TN you’ll be in good company with around 159,132 residents with around 70% of those homeowners. With an average age of 46, 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 1,147 homes have been sold with an average sold price of $215,333. That is an increase of $9,783 from the previous period.