Homesteading in Rock Township began in the early 1880s, even though the
Indian reservation did not officially open to settlers until 1904.
James McLaughlin, who had been the chief Indian agent at the local
Bureau of Indian Affairs agency on the reservation, reached an agreement with the
Spirit Lake Sioux Tribe which permitted settlement by non-tribal members. President
Theodore Roosevelt proclaimed homesteading the area officially open on June 2, 1904. By 1905 there were so many children that a school had to be built, and Plainview School District Number 31 was established that October. In 1910, township residents petitioned the county to allow them to formally organize a civil township with the name Plainview. However, there already existed a
Plainview Township in
Stutsman County, so the name Rock Township was adopted. By 1920, approximately 35 children attended the Plainview School No. 1, and Plainview No. 2 and No. 3 were soon added. In 1953 there were not enough students to operate the Plainview School, so students were transported to nearby
Sheyenne, with tuition paid for by the Plainview School District. In 1960, the Sheyenne School District and Plainview merged into one school district with shared bus service. ==Roads==