KleinBank is the largest family-owned state bank in Minnesota, with assets worth over $1.4 billion in 2012. There are nineteen locations throughout Minnesota, including Buffalo, Chanhassen, Cologne, Coon Rapids, Maple Grove, Norwood Young America, Otsego, St. Bonifacius, and Victoria.
In the mid-1890s, George Klein purchased a Chaska brickyard and put his sons Charles H. and Christian P. Klein in charge. In 1907, the brickyard was doing well, so Charles and Christian used proceeds from brick sales to purchase controlling interest in the First National Bank of Chaska. By 1929, the brothers' success allowed for a new building on what would eventually be known as the Klein Block on the west side of Chestnut Street in Chaska. By 1997, Chaska would have four branches, with the newest branch located on the north side of town.
The Klein brothers expanded their banking enterprise beyond Chaska in 1911 to nearby Victoria, with a 750-square-foot building valued then at $2,900. It would move to a new location in 1979. During the Great Depression, when banks all over Carver County were failing due to money shortages, Victoria State Bank was one of the few banks to remain open.
In 1919, the Kleins helped form the First National Bank of Waconia. It would be the only bank in Waconia that survived the Depression. The Waconia bank opened a new branch in the 1960s.
In 1926, The Kleins gained control of the State Bank of Young America and the State Bank of Cologne, further expanding their banking business.
Charles and Christian passed away in 1961 and 1962, respectively. George Klein, Christian's son, then gained ownership of the controlling interest in the Klein family banks. He became the company's president. His wife, Marcella, was a member of the Board of Directors at many of the branches. In 1975, growth of the family business reached new heights. Klein Bancorporation, Inc. (KBI) was formed to manage all Klein family-owned banks. In 1979, George's son, Dan Klein, became president and chairman after the death of his father. The bank then expanded to St. Bonifacius in 1977 and Chanhassen in 1993.
KBI became Klein Financial, Inc. in 1997. Three years later, its online banking website, kleinet.com, was launched. In 2005, all Klein Financial, Inc. banks combined into one banking entity: KleinBank, the largest family-owned and family-run state bank in Minnesota.