The Amazing Race 12 is the twelfth season of American reality competition show The Amazing Race. Hosted by Phil Keoghan, it featured eleven teams of two, each with a pre-existing relationship, competing in a race around the world in order to win US$1,000,000. This season visited four continents and ten countries and traveled over 30,000 miles (48,000 km). Starting in Los Angeles, racers traveled through Ireland, the Netherlands, Burkina Faso, Lithuania, Croatia, Italy, India, Japan, and Taiwan before finishing in Anchorage. New twists introduced in this season include the U-Turn, which replaced the Yield and allowed one team to force another team to perform both Detour tasks on a leg, and a new non-elimination leg penalty called the Speed Bump, which is an extra task that the team who finished last had to perform on the subsequent leg. The season premiered on CBS on November 4, 2007, and the finale aired on January 20, 2008.

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.