Guilford, Missouri - Population 86 (2014) - Guilford is a village in Nodaway County, Missouri, United States, near the Platte River. The population was 85 at the 2010 census. Up until May, 2013 Guilford was served by the South Nodaway R-IV School District, and was home of the elementary school (grades Pre-K-6). The high school, grades 7-12, was in Barnard, MO, 5 miles west of town. In May, 2013 all grades were moved to the Barnard school and the school in Guilford was closed.