Dennis Pennington (May 18, 1776 – September 2, 1854) was a farmer and a stonemason who became known for his many years in public office as an early legislator in the Indiana Territory and in Indiana's General Assembly as a representative of Harrison County, Indiana. Pennington, a member of the Whig Party, became the first speaker of the Indiana territorial legislature's lower house in 1810, served as the territory's census enumerator in 1815, and represented Harrison County as one of its five delegates to the constitutional convention of 1816. Pennington was the first speaker of the Indiana Senate (1816 to 1818), and served in the state legislature for eighteen years, which included five years in the Indiana House of Representatives and thirteen years in the Indiana Senate. His major polit