BBC Sport has compiled the key numbers for the 2015 season, with a strong focus on Hamilton and Rosberg as well as some interesting statistics about the other drivers.
Find out who was the best starter, which driver accumulated the most penalties and plenty more besides.
43: Overall race wins, the most by a British driver
10: Wins this season (one fewer than 2014 but only Sebastian Vettel and Michael Schumacher have more in a season, having managed 13 in 2013 and 2004 respectively)
16: World championships won by British drivers (Mike Hawthorn, 1958; Graham Hill, 1962, 1968; Jim Clark, 1963, 1965; John Surtees, 1964; Sir Jackie Stewart, 1969, 1971, 1973; James Hunt, 1976; Nigel Mansell, 1992; Damon Hill, 1996; Lewis Hamilton, 2008, 2014, 2015; Jenson Button, 2009).
MORE HAMILTON STATS
He is the only driver to win at least one race in his first nine seasons in F1. Alain Prost, Michael Schumacher and Sebastian Vettel all raced for parts of a season before going on a similar run. Prost took part in 11 races in 1980 before winning every year from 1981 to 1990 while Schumacher took part in six races in 1991, before winning every year from 1992 to 2006.
The only drivers to have won more grands prix than Hamilton are Schumacher (91) and Prost (51). In 2015, he overtook Ayrton Senna (41) and Vettel (42)
16: Race wins for Mercedes (Equalling record from last season. The next best is 15 for McLaren in 1988 (16-race season), Ferrari in 2002 (17-race season) and Ferrari in 2004 (18-race season)
18: Pole positions for Mercedes (equalling record from last season, shared with Red Bull in 2011 - also a 19-race season)
Biggest improvement in 2014: Ferrari won 428 points in 2015 and finished second in the constructors' championship. In 2014 they managed 216 points, their worst season in F1 for more than 20 years.
Biggest drop in 2014: Last year Red Bull won 405 points and finished second in the constructors' championship. In 2015 they scored only 187 points and finished fourth, failing to win a race for the first time since 2008.