Beechgrove, also known as Beech Grove, is an unincorporated community in Coffee County, Tennessee, United States. Beechgrove is located in northwestern Coffee County at the junction of Interstate 24, U.S. Route 41, and State Route 64. Beechgrove has a post office with ZIP code 37018. Beechgrove, Tennessee, was named "Beech Grove," until zip codes were assigned to U.S. Post Offices.