William Waller Rucker (February 1, 1855 – May 30, 1936) was a U.S. Representative from Missouri.

He attended the common schools and moved to Chariton County, Missouri, in 1873.

He engaged in teaching in the district schools and eventually studied law.

In 1876, he got admitted into the bar and commenced practice in Keytesville, Missouri.

After losing the reelection in 1922 to the Sixty-eighth Congress, he resumed the practice of law in Keytesville, Missouri.