William J. Brown

William J. Brown may refer to:


 * William J. Brown (architect) (died 1970), American architect
 * William J. Brown (boxing) (1874–1943), American boxing commissioner, referee, and promoter.
 * William J. Brown (Indiana politician) (1805–1857), member of the Indiana House of Representatives
 * William J. Brown (Ohio politician) (1940–1999), Ohio Attorney General
 * William Jethro Brown (1868–1930), Australian jurist and professor of law