Copley Press was a privately held newspaper business, founded in Illinois, but later based in La Jolla, California. Its flagship paper was The San Diego Union-Tribune.
Copley News Service and The San Diego Union-Tribune, with notable work by Marcus Stern and Jerry Kammer, won the 2006 National Reporting prize for their disclosure that former Congressman Randy Cunningham received bribes, which ultimately led to his criminal conviction and imprisonment.
Additionally, the San Diego Evening Tribune, predecessor of the Union-Tribune, won Pulitzer Prizes in 1987 and 1979.
In the late 1970s, the American media reported that the Copley Press was used as a front by the Central Intelligence Agency. Reporters Joe Trento and Dave Roman claimed that James S. Copley, who served as publisher until 1973, had cooperated with the CIA since its founding in 1947. They also reported that a subsidiary division, Copley News Service, was used in Latin America by the CIA as a front.
Trento and Roman also said that reporters at the Copley-owned San Diego Union and Evening News spied on antiwar protesters for the FBI. They alleged that, at the height of these operations, at least two dozen Copley employees were simultaneously working for the CIA. James S. Copley was also accused of involvement in the CIA-funded Inter-American Press Association.
Copley Press began selling off properties in the 2000s. Hollinger International bought the Company's Chicago-area publications (The Herald News, The Beacon News, The Courier News, and The News Sun, along with several smaller papers) in 2000. The remaining Illinois papers (The State Journal-Register, the Peoria Journal Star, The Repository, and some smaller papers) were sold to GateHouse Media in 2007.