Robert John Morris (September 30, 1914 – December 29, 1996) was an American anti-communist activist who served as chief counsel to the United States Senate Subcommittee on Internal Security from 1951 to 1953 and from 1956 to 1958, was President of the University of Dallas and founded the now-defunct University of Plano.

Morris grew up in Jersey City, New Jersey, where his father actively opposed Frank Hague, the city's longtime mayor and Democratic Party boss of Hudson County. He was a graduate of Saint Peter's College and the Fordham University School of Law. In 1940, he served on a committee of the New York State Assembly investigating allegations of Communist activities in schools and colleges in New York State.

He joined the United States Navy during World War II, though he had initially been rejected due to an inability to see the color red, a story that he would frequently retell throughout his life. Morris was a commander of counterintelligence and psychological warfare, whose duties included writing propaganda items that were dropped over Japanese cities and interrogating captured prisoners.

Morris served as chief counsel to the Senate Judiciary Subcommittee on Internal Security from 1951 to 1953, leaving the following year when he was elected to serve as a municipal court judge in New York City. He returned as chief counsel from 1956 to 1958.

The New York Times described the subcommittee in 1951 as having a mandate that is practically "limitless in the whole field of security" and that its role "far overreaches the House Committee on Un-American Activities, as it far outreaches Senator Joseph R. McCarthy, Republican of Wisconsin." The subcommittee questioned businessmen, diplomats, scholars and schoolteachers, and opened investigations into an alleged Communist takeover of Hawaii, Communist control of the military-industrial complex, and Communist involvement on waterfront in New York City.

One of the subcommittee's most notorious events was the April 1957 suicide of E. Herbert Norman, the Canadian Ambassador to Egypt, after Norman found out that the subcommittee was reopening an earlier investigation regarding his involvement in a Communist study group. The death affected American-Canadian relations, with Canadians calling his death the result of a "smear campaign" by the subcommittee. Morris had announced a month before the suicide that there was adequate material to justify an investigation into charges that Norman was a Communist.

In a letter written to William F. Buckley, Jr. published in 1969, Whittaker Chambers gave Morris credit for much of the efforts attributed to Senator Joseph McCarthy, with Chambers stating that "I would say that Bob Morris really accomplished much of what the Senator is credited with".

In January 1958, as a resident of Point Pleasant Beach, New Jersey, Morris announced that he was running for the Republican Party nomination for the United States Senate from New Jersey, and would resign from his $13,000-a-year post as chief counsel as of January 31. In the April 1958 primary, Robert Kean won the Republican nomination with 43% of the vote, defeating U.S. President Dwight D. Eisenhower's Appointments Secretary Bernard M. Shanley, who had 36%, and Morris, whose 70,000 votes represented more than 20% of the primary votes.