Pamela Ramsey Taylor, who runs a local non-profit group in Clay County, referred to the first lady as an "ape".
"It will be refreshing to have a classy, beautiful, dignified first lady in the White House. I'm tired of seeing a Ape in heels," she said.
Local mayor Beverly Whaling responded with "just made my day Pam".
Ms Whaling is mayor of the town of Clay, which has a population of just 491.
It has no African American residents, according to the 2010 census. In Clay County as a whole, more than 98% of its 9,000 residents are white.
