Flag Pond is an unincorporated community in Unicoi County, Tennessee. It is part of the Johnson City Metropolitan Statistical Area, which is a component of the Johnson City–Kingsport–Bristol, TN-VA Combined Statistical Area – commonly known as the "Tri-Cities" region.
The community's name is believed to be derived from the presence of "flag flowers" (wild iris) growing in wet areas at the edge of a local pond.
Flag Pond is the location of a post office, assigned ZIP code 37657.
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