Nico Erik Rosberg (born 27 June 1985) is a German and Finnish former racing driver and entrepreneur, who competed under the German flag in Formula One from 2006 to 2016. Rosberg won the Formula One World Drivers' Championship in 2016 with Mercedes, and won 23 Grands Prix across 11 seasons.

The only child of Finnish 1982 Formula One World Champion Keke Rosberg and his German wife, he was born in Wiesbaden but was raised primarily in Monaco. Rosberg began competitive kart racing at the age of six and achieved early success, winning regional and national French championships, before moving to European-based series and world championships. At the age of 16, he progressed to car racing, winning nine races to claim the 2002 Formula BMW ADAC Championship with VIVA Racing. He subsequently moved to the higher-tier Formula 3 Euro Series with Team Rosberg in 2003 and 2004 before winning the inaugural GP2 Series championship with ART Grand Prix in 2005.

Rosberg first drove in Formula One with Williams from 2006 to 2009 and achieved two podium finishes for the team in 2008. For 2010, he moved to Mercedes, partnering fellow German and seven-time World Drivers' Champion Michael Schumacher. Rosberg took his first career win at the 2012 Chinese Grand Prix. He was the teammate of former karting friend, Lewis Hamilton, from 2013 to 2016, twice finishing runner-up to his teammate, and in his final season defeating Hamilton to win the 2016 title. He and his father Keke are the second father-son pairing, after Graham and Damon Hill, that have both won World Drivers' Championships.

Rosberg announced his retirement from motor racing five days after clinching the title, citing wanting to spend more time with his family and not wanting his driving ability to atrophy as the main factors behind his decision. Overall, he started 206 Grands Prix, achieving 23 wins, 30 pole positions, 20 fastest laps and 57 podium finishes. In retirement, Rosberg moved into driver management, television punditry, and became an eco-entrepreneur. He was awarded the Laureus World Sports Award for Breakthrough of the Year and was inducted into the FIA Hall of Fame in 2017.