Early years A failed attempt to start a football club in the city in 1903 was followed up two years later by the successful creation of
1. Mainzer Fussballclub Hassia 1905. After a number of years of play in the Süddeutschen Fußballverband (South German Football League), the club merged with FC Hermannia 07 – the former football side of Mainzer TV 1817 – to form
1. Mainzer Fussballverein Hassia 05, which dropped "Hassia" from its name in August 1912. Another merger after
World War I, in 1919, with Sportverein 1908 Mainz, resulted in the formation of
1. Mainzer Fußball- und Sportverein 05.
Die Nullfünfer ("05") was a solid club that earned several regional league championships in the period between the wars and qualified for the opening round of the national championships in 1921, after winning the
Kreisliga Hessen.
Mainz earned honours as the German amateur champions in 1982. The club returned to professional play with promotion to the
2. Bundesliga for a single season in
1988–89 with Bodo Hertlein as president, before finally returning for an extended run in
1990–91. Initially, they were perennial relegation candidates, struggling hard each season to avoid being sent down. However, under unorthodox trainer
Wolfgang Frank, Mainz became one of the first clubs in German football to adopt a flat four zone defence, as opposed to the then-popular man-to-man defence using a
libero. Due to the Bruchweg stadium's limited capacity, the home matches in UEFA Cup were played in
Frankfurt's
Commerzbank-Arena. After defeating Armenian club
Mika and Icelandic club
Keflavík in the qualifying rounds, Mainz lost to eventual champions
Sevilla 2–0 on aggregate in the first round. In the
2010–11 season, Mainz equalled the Bundesliga starting record by winning their first seven matches that season. They ended the season with their best finish to date in fifth place, good enough to secure them their second entry to the
UEFA Europa League, where they were eliminated in the third qualifying round by Romanian club
Gaz Metan Mediaș. The
2023–24 season was challenging for Mainz, as they spent most of it in 17th place, with only two wins by matchday 25. However, they drastically improved under coach
Bo Henriksen, remaining unbeaten in their last nine matches and winning five of them, including the final two against Borussia Dortmund and
VfL Wolfsburg. This impressive run lifted them from 16th to 13th place, ensuring their continued presence in the Bundesliga. In the
2024–25 season, Mainz surged to third place by late March 2025 after a 3–1 win over
Borussia Mönchengladbach, raising hopes of first-ever
UEFA Champions League qualification. However, a 2–2 home draw with
SC Freiburg, followed by a 3–1 away defeat to Dortmund, triggered a seven-match winless streak that saw Mainz slip to seventh place with two games remaining in the season. They eventually finished sixth, qualifying for the
Conference League. ==Recent seasons==