Walter William Law (November 13, 1837 – January 17, 1924) was a businessman and the founder of the 8,000-person village of Briarcliff Manor, New York. He was a vice president of furniture and carpet retailer W. & J. Sloane, and later founded the Briarcliff Lodge, the Briarcliff Table Water Company, Briarcliff Farms, and the Briarcliff Greenhouses. He founded or assisted in establishing several schools, churches, and parks in the village, and rebuilt its train station in 1906. In the early 1900s, Walter Law was the largest individual landholder in Westchester County.