Yonker is an unincorporated locality in Senlac Rural Municipality No. 411, Saskatchewan, Canada. It is located about 42 kilometres (26 mi) east of Chauvin, Alberta. Yonker is located along the Canadian National Railway. The community gets its name from Mr. O. Winter, who was a contractor for the Grand Trunk Pacific Railway. This line was named alphabetically, from the east, "Vera", after his daughter, "Winter" after himself; and to the west "Yonker", named after his mother's family.