Robert Tisch, 79, co-owner of the New York Giants football team and a civic leader in New York City for several decades, died Nov. 15 at his home in New York. He had brain cancer.

The Giants' other owner, Wellington Mara, died Oct. 25, also of cancer. Mara was the son of team founder Timothy J. Mara. Mr. Tisch bought 50 percent of the Giants in 1991 from Tim Mara, Wellington Mara's nephew, not long after the Giants beat the Buffalo Bills in the Super Bowl.

Mr. Tisch was U.S. postmaster general from 1986 to 1988 and was chairman and director of the Loews Corp., a company he and his late brother, Laurence Tisch, bought in 1959 when it was a movie theater chain.

The company, which changed its name from Loews Theaters in 1971, owns and operates Loews Hotels, Lorillard Tobacco Co. and Bulova Corp., among other interests.

Doctors diagnosed an inoperable tumor in Mr. Tisch's brain in 2004, and Mr. Tisch subsequently curtailed his visits to Giants practices and games. During his illness, his son, Steve Tisch, was named the Giants' executive vice president and took on a larger role in the operations of the team, particularly in the negotiations between the Giants and the State of New Jersey over a new stadium at the Meadowlands sports complex.

The Giants will continue to be co-owned by the Tisch and Mara families.

A native of New York, Robert Tisch was involved in numerous civic organizations. He served as chairman of the New York Convention and Visitors Bureau for 19 years and was chairman of the citizens committee for the Democratic national conventions held in New York in 1976 and 1980.

Mayor David N. Dinkins once appointed Mr. Tisch the city's "ambassador" to Washington. He also was chairman of the New York Chamber of Commerce and Industry from 1990 to 1993.

Among the charitable organizations Mr. Tisch helped found was Take the Field, a nonprofit corporation that has raised more than $130 million to renovate and rebuild public school athletic facilities in New York.

He was born Preston Robert Tisch on April 29, 1926. After serving in the Army in World War II, he received a bachelor's degree in economics from the University of Michigan.

Survivors include his wife, Joan Hyman Tisch, and three children.

Robert Tisch, left, and Wellington Mara, whose families co-own the New York Giants, at a news conference in April. They died less than a month apart. Mr. Tisch also was chairman and director of the Loews Corp.