The population in Peter was 324 in 2010, ranking it 257 among 326 places. This represents an increase of 94 from 230 in 2000. The largest minority group in 2010 in Peter was Hispanic/Latino, which accounted for 2.5 percent of the total population. Households with children under 18 made up 42.3 percent of all households in 2010, a decrease from 52.2 percent in 2000. Owner-occupied housing units accounted for 95.9 percent of all households in 2010, an increase from 2000 when 92.8 percent of all housing units were owner-occupied.