City won the 2017–18 EFL Cup on February 25, defeating Arsenal 3-0 at Wembley Stadium to claim their first trophy under Guardiola.

Following Manchester United's 0-1 home loss to West Bromwich Albion on April 15, City was declared the Premier League champions. This was the team's third Premier League championship, fifth English top-flight crown, and second league and League Cup double in the previous four years.

With five games remaining, Manchester City captured their third Premier League title and fifth overall in the English premier division.

Over the course of the season, the team broke a number of Premier League records, including the most points (100), most victories (32), most victories away from home (16), most goals (106), most consecutive league victories (18), highest goal difference (+79), fewest minutes behind in matches (153 minutes), and largest winning points margin. (19). For the first time since the 2011–12 season and just the third time in Premier League history, all three promoted clubs escaped relegation.

Manchester City broke and established a number of the new club and English football records throughout the season. They equaled the Premier League record for consecutive away league wins (11) and set club records for 28 consecutive games without a loss in all competitions, 30 consecutive games without a loss in the league, 20 consecutive home wins in all competitions, and winning 14 away games in a season.

They also set national records for consecutive away (11) and overall (20) victories in all competitions. They achieved their second league and League Cup double in four years and won their sixth English league championship.