Flat is an unincorporated community in southern Phelps County, Missouri, United States. It is located approximately sixteen miles southwest of Rolla. The community is at the intersection of Missouri routes M and T. Edgar Springs lies about four miles to the southeast at the intersection of route M and U.S. Route 63. The headwaters of Mill Creek are just to the east of the community. The village lies within the boundaries of the Mark Twain National Forest.Missouri Atlas & Gazetteer, DeLorme, 1998, First edition, pp. 46 & 54,
