Peter George Angelos (born George Angelos; July 4, 1929 – March 23, 2024) was an American trial lawyer and baseball executive from Baltimore, Maryland. Angelos was the majority owner of the Baltimore Orioles, a team in the American League of Major League Baseball, from 1993 until his death in 2024.

George Angelos was born in Pittsburgh on July 4, 1929, the son of John and Frances Angelos, who immigrated to the United States from Menetes, Karpathos, Greece. His first name was changed to Peter shortly after his birth. Angelos' family settled in the working-class neighborhood of Highlandtown, Baltimore, and lived in a row house. Angelos' father, who spoke mostly Greek at home, owned a local tavern.

After graduating from Patterson Park High School, Angelos attended the University of Baltimore, where he earned a bachelor's degree. He then attended law school at the University of Baltimore School of Law, taking night classes while he worked in his family's tavern. He graduated from law school in 1960 and was named class valedictorian.

Angelos passed the bar in 1961 and opened an office specializing in handling product-liability cases for employees, almost always on a contingency basis. In one of his cases, he represented some 8,700 steelworkers, shipyard workers, and manufacturers' employees in a consolidated-action asbestos poisoning suit that was partially settled in 1992. Angelos' take from that litigation alone has been estimated at $330 million. He served a brief stint on the Baltimore City Council from 1959 to 1963 and ran for mayor on the city's first interracial ticket in 1967, but lost to Thomas D'Alesandro III. In the mid-1980s, Angelos was investigated by the Federal Bureau of Investigation into whether Angelos was running a sham medical service company and fraudulently billing insurers. The investigation went as far as executing a search warrant at one of his offices and federal prosecutors obtaining grand jury subpoenas, but Angelos was not charged with any related crimes.

In March 1996, Maryland hired Angelos to represent the state in its suit against tobacco companies with a 25% contingency fee. After Angelos filed suit on behalf of the state the trial court ruled that the state's recovery would be limited to subrogation of losses through programs such as Medicaid; this would have effectively ended the state's case. Angelos successfully lobbied the state legislature to change the law to allow the state's suit to proceed. The Maryland state legislature also cut Angelos' fee to 12.5%. Eventually he settled for $150 million paid over five years.

Angelos also represented the state of Maryland in a suit against Philip Morris and suing Wyeth, the makers of part of the diet pill combination fen-phen. As of 2019, Angelos' law firm had offices in Baltimore, Towson, and Cumberland, Maryland; Philadelphia, Bethlehem, and Harrisburg, Pennsylvania; and Knoxville, Tennessee. The firm is headquartered in the historic One Charles Center building in downtown Baltimore which was purchased by Angelos for $6 million in 1996.

A lifelong Democrat, Angelos began his political career with an unsuccessful run for Maryland Senate in 1958. He went on to hold a seat on the Baltimore City Council from 1959 to 1963. He was the first Greek-American to be elected to the council. Though Angelos became known for demanding governmental oversight and fiscal responsibility, few of his calls for investigations into city agencies and spending led to lasting change. In 1963, he ran unsuccessfully for city council president, but lost to Thomas D'Alesandro III, who was both the son of a popular former Mayor of Baltimore and would later be Mayor of Baltimore himself.

Angelos ran for the Democratic nomination in the 1967 Baltimore mayoral election, on the city's first racially integrated ticket, with Clarence Mitchell III was running for City Council President, but he lost the nomination to D'Alesandro, who received nearly 75% of the vote and went on to beat Republican Arthur W. Sherwood in the general election.