- Mankato is a city located in Blue Earth County, Minnesota, United States. It is situated along the Minnesota River, approximately 80 miles southwest of Minneapolis. Mankato is the fourth-largest city in Minnesota, with an estimated population of over 42,000 residents as of 2020. The city is known for its rich history, diverse community, and numerous outdoor recreational opportunities. Mankato is home to Minnesota State University, Mankato and is often referred to as the "Key City" due to its central location in the region. It offers a vibrant downtown area with shops, restaurants, entertainment venues, and hosts several events throughout the year.