The 2004 season was the Kansas City Chiefs' 35th in the National Football League (NFL), their 45th overall and their 42nd in Kansas City.
The 2002 season was the Kansas City Chiefs' 33rd in the National Football League (NFL), their 43rd overall and the franchise's 40th in Kansas City, Missouri.
The 2001 season was the Kansas City Chiefs' 32nd in the National Football League (NFL) and their 42nd overall. It was their first year under head coach Dick Vermeil and 13th under general manager Carl Peterson. They finished the regular season with a 6–10 record.
The 2000 season was the Kansas City Chiefs' 31st in the National Football League (NFL), their 41st overall and their second and final season under head coach Gunther Cunningham. They failed to improve on their 9–7 record from 1999 and finished the season 7–9, marked by a series of on and off-field struggles and incidents.
The 1999 season was the Kansas City Chiefs' 30th in the National Football League (NFL) and their 40th overall. The season began with the promotion of defensive coordinator Gunther Cunningham to head coach following the resignation of Marty Schottenheimer after the Chiefs finished with a 7–9 record in 1998.
The 1998 season was the Kansas City Chiefs' 39th in the National Football League (NFL) and their 29th overall.
The 1997 season was the Kansas City Chiefs' 28th in the National Football League (NFL) and their 38th overall. The Chiefs improved on their 9–7 record from 1996, and finished with a 13–3 record and as AFC West division champions. The Rich Gannon–Elvis Grbac quarterback controversy was a focal point of the team's season. It brewed throughout the entire season and arguably cost the Chiefs a victory in the playoffs. The Chiefs were defeated by division rival and eventual Super Bowl champion, Denver Broncos, in the 1997 playoffs. 1997 was the final season the Chiefs appeared in the playoffs during the 1990s and for the next several seasons, they fell into futility. They did not return to the playoffs until 2003.
The 1996 season was the Kansas City Chiefs' 27th in the National Football League (NFL) and their 37th overall. Following their loss to the Colts in the playoffs the year before, the Chiefs failed to improve their 13–3 record from 1995 and finishing 9–7 record and second-place finish in the AFC West. Despite being predicted as one of the eventual winners of Super Bowl XXXI by Sports Illustrated, the team missed the playoffs for the first time since 1989.
The 1994 Kansas City Chiefs season was the franchise's 25th season in the National Football League, the 32nd as the Kansas City Chiefs and the 35th overall. They failed to improve their 11–5 record from 1993 and finishing with a 9–7 record and Wild Card spot in the 1994–95 playoffs. The Chiefs lost to the Miami Dolphins 27–17 in the wild-card round. Alongside celebrating the NFL's 75th anniversary season, Hall of Fame quarterback Joe Montana retired following the season.
The 1992 Kansas City Chiefs season was the franchise's 23rd season in the National Football League and the 33rd overall. The Chiefs matched their 10–6 record from 1991, but were shut out by the San Diego Chargers 17–0 in the wild-card round.
The 1987 Kansas City Chiefs season was the franchise's 18th season in the National Football League and the 28th overall. Under new head coach Frank Gansz, the Chiefs split their first two games, 1-1. The 1987 NFL season featured games predominantly played by replacement players, as the National Football League Players Association (NFLPA) players went on strike from weeks four to six with week three being cancelled across the league. The replacement players went 0–3. After the regulars returned, the Chiefs continued to struggle. They lost their next five games to stand at 1–9 and finished the season with a 4–11 record a year after making the playoffs in 1986.
The 2011 season was the Kansas City Chiefs' 42nd in the National Football League (NFL), their 52nd overall and their third under the head coach/general manager tandem of Todd Haley and Scott Pioli. A 10–6 record in their 2010 season lent high expectations to their 2011 season, but the Chiefs suffered reversed fortunes. A season-ending hand injury to their starting quarterback Matt Cassel in their eighth game of the season proved especially significant. After a 4–4 record with Cassel at the helm, the Chiefs staggered to a 7–9 win–loss record by season end and failed to make the playoffs.
The 2012 season was the Kansas City Chiefs' 43rd in the National Football League (NFL), their 53rd overall and their first and only full season under head coach Romeo Crennel, who had served as the interim head coach for the final three games of the 2011 season following Todd Haley's termination. The Chiefs failed to rebound from their 7–9 record in 2011, and were eliminated from playoff contention in Week 12. Although they shared the same 2–14 record as the Jacksonville Jaguars for the worst record of the season, the Chiefs had a lower strength of schedule, so they were awarded the first pick in the 2013 NFL draft. The Chiefs went 0–12 against AFC opponents in 2012; their only wins of the season were from NFC teams, against the Carolina Panthers and New Orleans Saints. In 2017, ESPN.com named the 2012 season the Chiefs’ worst in franchise history.
The 2014 season was the Kansas City Chiefs' 45th in the National Football League (NFL), their 55th overall and their second under the head coach/general manager tandem of Andy Reid and John Dorsey. The Chiefs broke the crowd noise record on Monday Night Football against the New England Patriots on September 29, 2014 with a crowd roar of 142.2 decibels. The Chiefs failed to match their 11–5 record from 2013, and missed the playoffs. However, they defeated both teams that would eventually meet in that season's Super Bowl: the New England Patriots and the Seattle Seahawks. The 2014 Kansas City Chiefs became the first NFL team since the 1964 New York Giants, and the only team in the 16 game season era, to complete an entire season with no touchdown passes to a wide receiver.
The 2015 season was the Kansas City Chiefs' 46th in the National Football League (NFL), their 56th overall and their third under the head coach/general manager tandem of Andy Reid and John Dorsey. The Chiefs went through a poor start in their first six games as they were 1–5, and lost their star running back, Jamaal Charles, to a torn ACL in his right knee during an 18–17 Week 5 loss at home against the Chicago Bears. In week 16, after their ninth consecutive victory and the Baltimore Ravens defeating the Pittsburgh Steelers, the Chiefs clinched a playoff berth, their second in three years. They are the first team since the 1970 Cincinnati Bengals to start the season 1–5 and qualify for the playoffs. They also set the franchise record for the most consecutive victories, winning 10 in a row. In their Wild Card matchup, the Chiefs were set up to play against the Houston Texans. The Chiefs shutout the Texans 30–0 to earn their first playoff win in 22 years, ending what was at the time, until the Bengals broke the record the night the Chiefs won, an NFL record for consecutive playoff losses. The shutout was the Chiefs first ever playoff shutout and remains, as of the 2023–24 playoffs, the most recent playoff shutout in the NFL. The following week, they were defeated by the New England Patriots in the divisional round 27–20.
The 2016 season was the Kansas City Chiefs' 47th in the National Football League (NFL), their 57th overall and their fourth under head coach Andy Reid and the fourth and final season under general manager John Dorsey who was fired June 22, 2017. The Chiefs clinched their first AFC West division title since 2010, beginning a streak of nine consecutive that still stands as of 2024. The Chiefs also clinched a first-round bye for the first time since 2003, but lost to the Pittsburgh Steelers in the Divisional round 18–16.
The 2018 Kansas City Chiefs season was the franchise's 49th season in the National Football League (NFL), their 59th overall, their sixth under head coach Andy Reid, and their second under general manager Brett Veach. The Chiefs finished 12–4 and won their third consecutive AFC West title, made their fourth consecutive playoff appearance, but lost to the eventual Super Bowl champion New England Patriots 37–31 in overtime in the AFC Championship game. Quarterback Patrick Mahomes won the AP NFL MVP award, becoming the first Chiefs player to ever be named MVP.
The 2019 season was the Kansas City Chiefs' 50th in the National Football League (NFL), their 60th overall, their seventh under head coach Andy Reid and third under general manager Brett Veach.
The 2020 Kansas City Chiefs season was the Kansas City Chiefs' 51st in the National Football League (NFL), their 61st season overall and their eighth under head coach Andy Reid. The Chiefs, who entered the season as defending Super Bowl LIV champions, qualified for the playoffs for the sixth consecutive season, tying a franchise record set from 1990 to 1995 and won the division for the fifth consecutive year. They finished with a franchise-record and league-leading 14 wins. The Chiefs appeared in Super Bowl LV, their second consecutive Super Bowl appearance and fourth in franchise history, but lost to the Tampa Bay Buccaneers, 31–9. With the loss, the Chiefs became the sixth defending Super Bowl champion to lose the next year's game, after the 1978 Dallas Cowboys, the 1983 Washington Redskins, the 1997 Green Bay Packers, the 2014 Seattle Seahawks, and the 2017 New England Patriots.
The 2022 season was the Kansas City Chiefs' 53rd in the National Football League (NFL), their 63rd overall, their 10th under head coach Andy Reid, and their sixth under general manager Brett Veach. The Chiefs finished the regular season 14–3, improving their win total from the previous season and matching the franchise record for wins.
