Serving South Dakota from South DakotaDe Smet Farm Mutual Insurance Company of South Dakota has a long and consistent history of providing insurance coverage for the people of South Dakota since 1916.De Smet Farm Mutual was formed by a small group of farmers at a time when the large, well-established insurance companies weren't interested in coming to the prairies of South Dakota to write insurance.As rural life in South Dakota improved, the appetites of the outside insurance companies increased for South Dakota business and so eventually they came into the state for our insurance business. Since that time, many of those insurance companies have come and gone -- depending on the fortunes of a rural state like South Dakota.