William Henry ("Judge") Moore (1848 – January 11, 1923) was an American attorney and financier.
He organized and promoted or sat as a director for several steel companies that were merged with among others the Carnegie Steel Company to create United States Steel.
He and his brother James Hobart Moore helped create the Diamond Match Company, National Biscuit Company, First National Bank, the Delaware, Lackawanna and Western Railroad, the American Can Company, the Lehigh Valley Railroad, the Chicago, Rock Island and Pacific Railroad, the Continental Fire Insurance Company, the Western Union Telegraph Company, the American Cotton Oil Company, and Bankers Trust.