Marcos Ambrose, Australian race car driver
Marcos Ambrose (born 1 September 1976) is an Australian former racing driver and current Garry Rogers Motorsport competition director. He won the Australian V8 Supercar series' championship in 2003 and 2004.

In 2006, Ambrose relocated to the United States to pursue racing in NASCAR, starting with the Camping World Truck Series. He moved up to the Nationwide Series in 2007, and later the Sprint Cup Series in 2008. In 2011, he earned his first Cup Series win at Watkins Glen International, becoming the first Australian driver to win in the highest level of NASCAR, and repeated that win in the following year.

He is known in NASCAR for having won a total of 6 races at Watkins Glen. In the Sprint Cup Series he won at the Glen in 2011 and 2012. In the Nationwide Series he won 3 races at the Glen in 3 years 2008, 2009 and 2010. He won his last race during the 2014 NASCAR Nationwide series at the Glen. It was the only race he ran during that season.