Anna Tunnicliffe Tobias (born October 17, 1982) is an American sailor and CrossFit competitor.

[1] In 2008 she won an Olympic gold medal in the Laser Radial single handed sailing class.

She has three first-place event finishes at the Games: "The Beach" in 2014, "Sandbag 2015" in 2015, and "Rope Chipper" in 2016.

Anna moved to Perrysburg, Ohio, in the United States, with her family at the age of 12.

She attended Perrysburg High School and joined the North Cape Yacht Club, racing Optimists and other small boats for the next five years.

In her senior year she won the district track championships in the 800 meters, setting a new high school record of 2 minutes 17.56 seconds.