Philetus Walter Norris (August 17, 1821 – January 14, 1885) was an American pioneer, businessman, Union Army officer and politician who was the second superintendent of Yellowstone National Park and was the first person to be paid for that position. He fought in the Civil War, served as a spy behind Confederate lines, and rose to the rank of colonel. He was elected to the Ohio Legislature and founded the town of Norris in Wayne County (now within Detroit), where he ran a real estate business. Mount Norris in Yellowstone is named after him.