Nelson Dewey (December 13, 1813 - July 21, 1889) was a member of the Democratic Party, and the First Governor of Wisconsin from 1848 - 1852. After his election to the post of register of deeds in newly formed Grant County, territorial Governor Henry Dodge appointed Dewey justice of the peace. He completed a law degree, passed the territorial bar examination, and launched a legal and business career in nearby Lancaster, earning a fortune in land and lead-mining investments. In 1848, after serving in the territorial Legislature, he was elected Governor of Wisconsin at age 35.