The Amazing Race 8 is the eighth season of the American reality competition show The Amazing Race. Hosted by Phil Keoghan, this season of the series, which normally features pairs of adults with a pre-existing relationship, featured ten families of four, including the participation of minors as young as eight years old, competing in a race across North America in order to win US$1,000,000. This season visited twelve states, one federal district, and three additional countries and traveled over 11,000 miles (18,000 km). Starting in New York City, racers traveled through New York, New Jersey, Pennsylvania, the District of Columbia, Virginia, South Carolina, Alabama, Mississippi, Louisiana, Panama, Costa Rica, Arizona, Utah, Wyoming, Montana, and Canada before finishing in Lewiston, New York. A new twist introduced in this season includes select Roadblocks performed by two team members. The season premiered on CBS on Tuesday, September 27, 2005, and concluded on Tuesday, December 13, 2005.

The Amazing Race is an American reality competition show in which teams of two race around the world. Each season is split into legs, with each leg requiring teams to deduce clues, navigate themselves in foreign areas, interact with locals, perform physical and mental challenges, and travel by airplane, boat, taxi, and other public transportation options on a limited budget provided by the show. Teams are progressively eliminated at the end of most legs, while the first team to arrive at the end of the final leg wins the grand prize of US$1 million. As the original version of the Amazing Race franchise, the CBS program has been running since September 5, 2001. Numerous international versions have been developed following the same core structure, while the American version is also broadcast to several other countries.