His successor Frank O'Farrell was unable to prevent relegation, but the club reached the FA Cup final in 1969, losing to Manchester City 1–0.

Jock Wallace resumed the tradition of successful Scottish managers (after Peter Hodge and Matt Gillies) by steering Leicester to the Second Division championship in 1980.

[23] Leicester began well under Taylor's management, topping the Premier League for two weeks in the autumn and remaining in contention for a European place for most of the campaign, before a late-season collapse dragged them down to a 13th-place finish.

Taylor was sacked after a poor start to the 2001–02 season, and his successor Dave Bassett lasted just six months before being succeeded by his assistant Micky Adams, the change of management being announced just before relegation was confirmed.

[28] Following relegation to the third tier the previous season, Leicester returned to the Championship at the first attempt in 2008–09, finishing as champions of League One after a 2–0 win at Southend United, with two matches in hand.

[32] On 1 October 2010, after a poor start that saw Leicester bottom of the Championship with only one win out of the first nine league matches, Paulo Sousa was sacked by the club with immediate effect.

[34][35] On 10 February 2011, Vichai, part of the Thai-based Asia Football Investments consortium, was appointed new chairman of the club after Mandarić left in November to take over Sheffield Wednesday.

[36] Leicester were viewed as one of the favourites for promotion in the 2011–12 season, but on 24 October 2011, following an inconsistent start with the Foxes winning just 5 out of their first 13 matches, Eriksson left the club by mutual consent.

However, Leicester lost the playoff semi-final 3–2 on aggregate to Watford after Manuel Almunia made a double save from an Anthony Knockaert late penalty and Troy Deeney scored at the other end following a swift counterattack.

Their 2–1 home win over Sheffield Wednesday, combined with losses by Queens Park Rangers and Derby County, allowed Leicester City to clinch promotion to the Premier League after a ten-year absence.

[40] On 21 September 2014, Leicester went on to produce one of the greatest comebacks in Premier League history, beating Manchester United 5–3 at King Power Stadium.

This could have brought a sudden end to Leicester's seven-year rise, but seven wins from their final nine league matches meant The Foxes finished the season in 14th place with 41 points.

[50] On 19 December, Leicester defeated Everton 3–2 at Goodison Park to top the Premier League on Christmas Day, having been bottom exactly 12 months earlier.

[51] A 2–0 victory at Sunderland on 10 April, coupled with Tottenham Hotspur's 3–0 win over Manchester United, ensured Leicester's qualification for the UEFA Champions League for the first time in their history.

[53][54] Bookmakers thought Leicester's victory was so unlikely that Ladbrokes and William Hill offered odds of 5,000–1 for it at the start of the season, which subsequently resulted in the largest payout in British sporting history with total winnings of £25 million.

[73] The Foxes then faced La Liga club Sevilla in the round of 16 and defeated the Spanish side 2–0 on the night, and 3–2 on aggregate to advance to the quarter-finals.

On 27 October 2018, a Leonardo AW169 helicopter carrying chairman Vichai Srivaddhanaprabha and four others malfunctioned and crashed outside the club's stadium, shortly after taking off from the pitch.

The 2019–20 season started with the team picking up 38 points from their first 16 matches, which included a record eight-game winning streak from 19 October to 8 December.

[85] On 15 May 2021, Leicester City won the FA Cup for the first time (having lost all of their previous four finals), securing a second major trophy in the space of five years; Youri Tielemans scored the only goal against Chelsea at Wembley Stadium.

[89] The club's finances were heavily impacted by the COVID pandemic, with the parent company King Power International Group being in the travel retail (DF&TR) sector.

[90][91] During the 2022 summer transfer window, Leicester were restricted in their spending amid concerns over breaching Financial Fair Play regulations.

This dramatically increased their wages-to-turnover ratio, and failure to qualify for European football in the proceeding season (2021–22) was also a factor in reduced spending during the summer of 2022.

[111] The club also play a modern version of their anthem "When You're Smiling" before kick-off on home matchdays, with the connection to the song dating back to the late 1970s.

[114] Previous manufacturers have included Bukta (1972–76, 1990–92), Admiral (1976–79, 1983–88), Umbro (1979–83), Scoreline (1988–90), Fox Leisure (1992–2000), Le Coq Sportif (2000–05), JJB (2005–07), Jako (2007–09), Joma (2009–10), Burrda (2010–12)[115] and Puma (2012–18).

[105][119] Other sponsors have included John Bull (1986–87),[105] LG (2001–03),[105] Alliance & Leicester (2003–07),[105] Topps Tiles (2007–09),[105] Loros (2009–10), King Power (2010–21, 2023–24), Tourism Authority of Thailand (2020–21) and FBS (2021–23).

[123] Some improvements by noted football architect Archibald Leitch occurred in the Edwardian era, and in 1927 a new two-tier stand was built,[123] nicknamed "the Double Decker", which would persist until the ground's closure in 2002.

In England and Wales, Leicester were listed as the second most violent football club in August 2000,[139] and averaged the fifth highest number of hooligans at matches between 2019 and 2023.

[156] The highest-ever attendance for a non-competitive football match at King Power Stadium stands at 32,188, for a pre-season friendly against Real Madrid on 30 July 2011.

[158] The club's longest run of consecutive victories in league football is currently nine, which the team achieved between 21 December 2013 and 1 February 2014 in the EFL Championship.

On 25 October 2019, the Leicester team set the record for the highest margin of away victory in English top-flight history, defeating Southampton 9–0 at St Mary's Stadium.