sentences:  "Luang" Udom Khet Borihan became the first district head officer.Neighboring districts are (from the north clockwise) Phrom Phiram, Wat Bot, Wang Thong, Bang Krathum and Bang Rakam of Phitsanulok Province.Mueang Phitsanulok lies within the Nan Basin, although the district's western border with Bang Rakam District is essentially the boundary between the Nan Basin and the Yom Basin as well.