The strong start of the season saw the club at the top of the Premier League at Christmas, having scored in each of their first 17 games. During this run, their No.9 striker Jamie Vardy broke the Premier League record by scoring in 11 consecutive league games.
Leicester entered April at the summit of the Premier League and on 10 April 2016, they clinched a spot in the 2016–17 UEFA Champions League after a 2–0 away win over Sunderland. Despite pressure from the chasing teams, Leicester maintained their lead at the top of the table throughout April and entered May knowing they only needed 3 points to lift the Premier League trophy.
After Ranieri's appointment had been questioned in the media, barely avoiding relegation the previous season, and starting the 2015–16 Premier League campaign as 5,000–1 outsiders to win the title, Leicester City clinched the Barclays Premier League title. This was the first time the club had won the title in their 132-year history. The team's success was described as a "fairytale" and the "most unlikely triumph in the history of team sport".
In spite of Ranieri's previous "Tinkerman" nickname, Leicester consistently played the same line-up under his stewardship, using fewer players than any other team. With Leicester, Ranieri reverted to his preferred 4–4–2 formation, which made use of heavy pressing, defensive organisation, and fast counter-attacks.
On 16 May, Ranieri was named Manager of the Year for 2016 by the League Managers' Association, and on 18 May, he was named the 2016 Barclays Premier League Manager of the Season.