Ban Sam Ruen (Thai: บ้านสามเรือน) is a village in the Nakhon Pa Mak subdistrict of Amphoe Bang Krathum District of Phitsanulok Province, Thailand.

Ban Sam Ruen is located in the south-west portion of Nakhon Pa Mak on the Wang Thong River.

Wat Rat Samosom School is Sam Ruen's elementary and high school, which provides basic education for villagers of Ban Sam Ruen and neighboring villages in Nakhon Pa Mak.

Each day at Sam Ruen School begins with the raising of the Thai flag, conducted by one male and one female student, while the remainder of the student and faculty body sing the Thai national anthem.

Lunch is provided by parents of the students who take turns volunteering in the preparation and food service.