John Hawkins Rountree (March 24, 1805 – June 27, 1890) was an American farmer, businessman, politician, and Wisconsin pioneer. He was the founder of Platteville, Wisconsin, and was instrumental in the early development of that village. He was also one of the founders of the Northwestern Mutual Insurance Company, and remained a director in the company until his death. In politics, he represented Grant County for five years in the Wisconsin Legislature, and was a delegate to Wisconsin's 2nd constitutional convention in 1847.