Benjamin J. Gibson (November 13, 1882 – July 8, 1949) was an American politician and lawyer.
Born in Adams County, Iowa, Gibson went to the public schools in Adams County. He graduated from University of Nebraska–Lincoln in 1906 and was admitted to the Iowa bar. Gibson practiced law in Corning, Iowa. He served in the Iowa State Senate in 1917 and was a Republican. During World War I, Gibson served in the United States Army and was commissioned captain. From 1921 to 1927, Gibson served as Iowa Attorney General. He moved to Des Moines, Iowa, and continued to practice law. Gibson died in Rochester, Minnesota, after having stomach surgery.