Robert E. O'Connor Jr. (December 9, 1944 – September 1, 2006) was an American politician who was the Mayor of Pittsburgh, Pennsylvania from January 3, 2006, until his death.

Born in the Greenfield neighborhood, and a longtime resident of Squirrel Hill, O'Connor graduated from Pittsburgh's Taylor Allderdice High School in 1962 and was inducted into their alumni hall of fame in 2011.

He and his wife, Judy Levine O'Connor, had one daughter, Heidy Garth, and two sons, Terrence, who became a Catholic priest, and Corey, a Pittsburgh city councilman who represented the same district as his father from 2012 until 2022.

O'Connor was able to raise the most money, collect many endorsements, establish the energetic and dedicated "Delta Team" led by Bob "Jabo" Jablonowski, and beat a group of challengers.

Among the runners up in the May 17 Democratic primary were Bill Peduto, a member of the city council, and Michael Lamb, a County Row Office Holder.

On November 17, 2006, the O'Connor family was presented with[6] the Hall of Fame Shining Lights Award for the former mayor's "Redd Up Pittsburgh" initiative.

During his illness, thousands of black and gold rubber bracelets, inscribed with the words "Bob O'Connor...Everybody's Mayor" and "The Leukemia & Lymphoma Society" were sold.

[9] On September 1, 2006, at 8:55 pm EDT, O'Connor died at UPMC Shadyside Hospital, 24 hours after being removed from life support.