Caleb Cushing was an American Democratic politician and diplomat who served as a Member of the U.S. House of Representatives from Massachusetts and the 23rd United States Attorney General under President Franklin Pierce. From 1874 until 1877, he was the United States Minister to Spain.

The United States attorney general (AG) is the head of the United States Department of Justice, and is the chief law enforcement officer of the federal government of the United States. The attorney general serves as the principal advisor to the president of the United States on all legal matters. The attorney general is a statutory member of the Cabinet of the United States.