Unirea Ungheni was founded in 1947 and played mostly in district, regional, and county championships. Unirea won the
Mureș County Championship for the first time in the 1992–93 season, but the team led by
player-coach Carol Erős failed to secure promotion to the
third division. The club finished below the top sixteen teams with the best aggregate results after matches against
Industria Sârmei Câmpia Turzii (0–3 away and 4–0 at home). The squad consisted of the following players: Ioan Bordaș, Zoltán Gyulai, Emil Olteanu, Emil Dobozi, Ștefan Szabó, Sorin Grama, Nicolae Bertea, Gheorghe Neagoe, Sorin Nistor, Gheorghe Botez, Marcel Țânțărean, Carol Erős, Vasile Blaga II, Ioan Nyárádi, Eugen Popa, Gheorghe Vasiu, Florin Dima, István Osváth, and Ioan Costea. Over the next seven seasons, Unirea continued to compete in the County Championship, achieving the following rankings: 3rd in the 1993–94, 5th in the
1994–95, 4th in the
1995–96, 7th in the
1996–97, 6th in
1997–98, 7th in
1998–99 and 5th in
1999–2000. Unirea Ungheni achieved its first-ever promotion to
Divizia C at the end of the
2000–01 season. Coached by Arpád Fazakas, the team won the
Divizia D – Mureș County title and secured promotion by defeating Eciro Forest Telciu, winners of
Divizia D – Bistrița-Năsăud County, 4–2 in a decisive play-off match at the
Ion Moina Stadium in
Cluj-Napoca. The squad included players such as Gyulai Zoltán, Adrian Profir, Claudiu Popescu, Marius Florea, Cosmin Boitoș, Mihai Laurențiu, Augustin Ținteșan, Ioan Feșteu, Nicolae Bokor, Florin Suciu, Cornel Șerban, József Szávuly, and Ioan Ötvös. In the
first season in the third tier, Nireștenii, led by Fazakas in the first half of the campaign and Eduard Bota in the second, finished 9th in Series VII. The
following season saw Unirea again finish 9th, three and six points ahead of county rivals
Avântul Reghin and
ASA Târgu Mureș, respectively. In the
2003–04 season, Bota was replaced during the winter break by Lucian Popa, but Unirea still managed to achieve the best result of this period, finishing 2nd in Series IX, twenty-seven points behind
FC Sibiu. In the
next season, the Reds and Blues finished 10th, narrowly avoiding relegation by two points. However, the
following season ended in disaster as Unirea finished last out of 14 in Series IX with only one win secured throughout the entire campaign and just seven points, leading to relegation to the
fourth division and the club's subsequent dissolution. In 2007, the
third-division side ASA Maris Târgu Mureș was relocated to Ungheni, where it merged with Unirea to form ASA Unirea Ungheni. Coached by Ioan Orosfăian for the following five consecutive seasons, the team finished the
2007–08 season in 11th place in Series VI. In the subsequent seasons, Unirea recorded the following rankings—6th in
2008–09, 10th in
2009–10, 7th in
2010–11, and 9th in
2011–12. Unfortunately, in 2012, financial difficulties forced the club to withdraw from the third division, leading to its dissolution for the second time in its history. The club was refounded in 2018 and admitted on demand to
Liga IV – Mureș County, finishing 3rd in the
2018–19 season and winning the Cupa României county phase under the leadership of Eduard Bota. The
2019–20 season, which was suspended in March 2020 due to the
COVID-19 pandemic, saw Unirea in 1st place and designated as
Mureș County winners, qualifying for the promotion play-off to
Liga III. Competing in Group A of Region 3 (Center) in
Brașov, at the
Silviu Ploeșteanu Stadium, the team led by Ioan Adrian Pop finished ahead of
Măgura Cisnădie, the
Sibiu County winners (6–1), and
Sepsi OSK's second team, the
Covasna County winners (2–0), earning promotion to Liga III after an eight-year absence. In the
2023–24 Liga III season, under the command of
Florentin Petre, with experienced players such as
István Fülöp,
Victoraș Astafei,
Amancio Fortes,
Cătălin Savin together with
Ovidiu Horșia, Paul Ganea, Yvan Ndiesse, Abel Popa, Silviu Boar, Cristian Gherasim, Ioan Bârstan among others, the club finished in 3rd place during the regular season, but finished 2nd in the Play-off round of Series IX, overtaking
ACS Mediaș and qualifying for the
promotion play-offs. Unirea won in the first round against
SCM Zalău (3–0 at home and 1–1 at Zalău), and in the second round against
Gloria Bistrița-Năsăud (2–2 at Bistrița and 2–1 at Ungheni) promoted for first time in
Liga II. ==Honours==