Morden is a city located in the Pembina Valley region of southern Manitoba, Canada near the United States border. It is about 11 km (6.8 mi) west of the neighbouring city of Winkler; together Morden and Winkler are often referred to as Manitoba's Twin Cities. Morden, which is surrounded by the Rural Municipality of Stanley, is the eighth largest and fastest-growing city in Manitoba. According to Statistics Canada, the city had a population of 9,929 in 2021, an increase of 14.5% from 2016, making it Manitoba's fastest growing city.

The Pembina Valley is an informal geographic region of the Canadian province of Manitoba. It is named for its major geographical feature, the Pembina Valley, which runs through the southwestern part of the region.