Mennonite settlers, led by Gerhard Ens, began arriving in the area around 1890, with the establishment of the Qu'Appelle, Long Lake & Saskatchewan Railway to Prince Albert.

One is that in the late 1880s when the railway ran through from Regina to Prince Albert a man by the name of Ross drowned in the creek that flows through the town.

[8] In all likelihood, however, the town's name echoes an old world name brought over by a homesick worker on the railroad, in this case that of Rostherne, a village in the United Kingdom.

[9] Rosthern has a public library, many parks and walking trails, Valley Regional Park with an 18-hole grass green golf course, two ball-diamonds, two indoor hockey rinks, a curling rink, bowling alley, and three school gyms.

[12][13] Valley Regional Park Golf Club is an 18-hole, par 72 course with grass greens and 6,577 total yards.