William John Bulow was an American politician and lawyer. He was the first Democratic Governor of South Dakota, serving from 1927 to 1931. He received the highest number of votes of any Democratic candidate for governor in the state up to that time. Bulow then went on to serve as a member of the United States Senate from South Dakota from 1931 to 1943.

The governor of South Dakota is the head of government of South Dakota. The governor is elected to a four-year term in even years when there is no presidential election. The current governor is Kristi Noem, a member of the Republican Party who took office on January 5, 2019.