The 2006–07 season was Chelsea F.C.'s 92nd competitive season, 15th consecutive season in the Premier League and 101st year as a club. Managed by José Mourinho, the club won both the FA Cup and the League Cup.

Chelsea were in race to win a unique Quadruple until 1 May. The 2006–07 Premier League was decided on matchday 36, after Chelsea failed to win against Arsenal at the Emirates Stadium. This left them seven points behind Manchester United with two games to go, confirming Manchester United as league champions.

The season was their fourth under the ownership of Roman Abramovich and Chelsea spent heavily in the transfer market before the season. Notable transactions include the signing of Andriy Shevchenko from Milan for £30 million and Salomon Kalou from Feyenoord for an undisclosed fee. They also added Michael Ballack from Bayern Munich on free transfer and also exchanged William Gallas and £5 million with Arsenal for Ashley Cole.

In the Champions League, Chelsea aimed to improve upon their first knockout round exit in the previous season. They managed to reach the semi-finals for the third time in four seasons, but lost to Liverpool 4–1 on penalties after a 1–1 aggregate scoreline. Chelsea also lost the pre season Community Shield to Liverpool at the beginning of the season.

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