Michał Kwiatkowski (Polish pronunciation: [ˈmixaw kfjatˈkɔfski], born 2 June 1990) is a Polish professional road bicycle racer, who currently rides for UCI WorldTeam Netcompany–Ineos.

Kwiatkowski is seen as a strong all rounder, with good sprinting, time-trialling and climbing abilities allowing him to win both stage races and one day classics. His talent was shown early in his career, winning the World Junior Time Trial Championships in 2008. In 2014, Kwiatkowski became the world elite road race champion, and he was also a member of the Omega Pharma–Quick-Step team that won the 2013 World Team Time Trial Championships. In 2017 he won his first 'Monument', Milan–San Remo, while in 2018, he won Tirreno–Adriatico and the Tour de Pologne. He is a two-time winner of two of the most prestigious non-Monument classics, the Amstel Gold Race and the Strade Bianche.

Kwiatkowski is a double European junior champion, winning the road race in 2007 and the individual time trial in 2008. In 2009 he became national road champion in the under-23 category, and he also won a stage of the Okolo Slovenska. He turned professional in 2010 with Caja Rural and in 2011 joined Team RadioShack, and placed third overall in the Driedaagse van West-Vlaanderen, the Three Days of De Panne and the Tour du Poitou-Charentes.

Kwiatkowski moved to Omega Pharma–Quick-Step for the 2012 season. He impressed in his first year with the team, winning the prologue of the Driedaagse van West-Vlaanderen. He also finished second overall in his home race, the Tour de Pologne, and eighth overall in the Eneco Tour.

Kwiatkowski began the 2013 season in excellent form, placing second overall in the Volta ao Algarve. He then finished fourth overall in Tirreno–Adriatico, and won the young rider classification, after proving one of the strongest climbers in the race. He finished fourth at the summit finish of Prati di Tivo to take the overall race lead from team-mate Mark Cavendish, before surrendering it the next day. Kwiatkowski then rode a strong classics campaign, placing fourth in the Amstel Gold Race and fifth in La Flèche Wallonne. In June, he won the senior National Road Race Championships for the first time.

Kwiatkowski's excellent form saw him selected to ride the Tour de France. He wore the white jersey – of young rider classification leader – in the first week after coming third on Stage 2 and fourth on Stage 3, both reduced bunch sprints. On Stage 7 he came in fourth again. On Stage 9 (a high mountain stage) he reached the podium once again. With a strong time trial, he was able to regain the white jersey of the young rider classification on Stage 11, but lost the lead shortly after to Nairo Quintana. Even though he lost the white jersey, he still finished 11th in his Tour debut.

In 2014, Kwiatkowski won the Italian Classic Strade Bianche. He followed a strong attack from Peter Sagan with 20 kilometres (12 miles) to go and the pair cooperated well until Kwiatkowski dropped Sagan on the final climb to Siena. He placed on the third step of the podium in Liège–Bastogne–Liège as well as in La Flèche Wallonne and fifth in the Amstel Gold Race.

In September, he grabbed the leader's jersey of the Tour of Britain by winning the fourth stage in a select group sprint of 6 riders. Overall he placed second in the general classification and first in the points classification.