Buffalo is a city in Dallas County, Missouri, United States. Buffalo is part of the Springfield, Missouri Metropolitan Statistical Area. According to the United States Census Bureau, Buffalo has a total area of 2.2 square miles (5.7 square kilometers), all of it land. There were 1,367 housing units at an average density of 621.9 per square mile (239.9/square kilometers). The racial makeup of the city was 96.91% White, 0.29% African American, 0.72% Native American, 0.04% Asian, 0.36% from other races, and 1.69% from two or more races.