ACS KSE特爾古塞奎斯

KSE Târgu Secuiesc was founded on 15 September 1912 thanks to the sports movement started by the students and craftsmen. At the inaugural meeting, the members unanimously elected Dr. Dénes Molnár (lawyer) as the president, Gyula Séra (public notary) and Kálmán Mina (chief of police) as the vice-presidents. KSE was set up with athletics and football departments and the first football match took place on 6 October 1912.

Until the 1940s, the "white and blues" played only at local and regional level, not having the financial strength to fight at a higher level. In August 1940, after the signing of the Second Vienna Award, Hungary annexed northern Transylvania, including Târgu Secuiesc and KSE was distributed in one of the Nemzeti Bajnokság II (Hungarian second division) series, the best rank in the history of the club, until now. Between 1941 and 1945, the club played only in the third tier, Nemzeti Bajnokság III, then after the return of Târgu Secuiesc between the borders of Romania, the team disappeared again from the national leagues.

During the 1950s and 1960s, the communists rebranded the club to eliminate its Hungarian influence and become a workers' club, fact that happened with many football clubs and sports associations in that period, especially based in Transylvania. KSE appeared for the first time in the Divizia C in 1970, under the name of Forestierul Târgu Secuiesc (Târgu Secuiesc Forestry).

Târgu Secuiesc would play constantly in the third division, for the next 12 years, under the name of Forestierul, then under the name of Metalul after the 1977 merge between Forestierul and Metalul or Izvorul after the 1978 merge with Izvorul Biborțeni. The best ranking of this period was a 5th place at the end of the 1971–72 season. In the rest of Divizia C editions, the club was ranked mainly in the middle or second part of the standings.

In 1983, after only one season spent at amateur level, KSE return to the third division, under the name of Metalul Târgu Secuiesc, subsequently spending another eight seasons at that level. This period was a much more fruitful one for the team based in Covasna County, Metalul obtaining rankings in the middle or first part of the table, between 1985 and 1987 also registering the best period and rankings of the club in the Romanian football league system, three consecutive rankings on the 3rd place.

In the summer of 1992, Metalul withdrew from Divizia C due to lack of funds, then enrolled in the 4th division. In this period the club was reformed in order to bring back its Szekler roots. The reform of the club took place under the management of Mihály Csatlós, then Kálmán Debreczi and Dr. Olivér Boga. In 1998, "the Székelys" promoted back in the third tier, this time under the name of Fortyogó Târgu Secuiesc. Fortyogó relegated after only one season, then promoted again in 2000, just to relegate after another season spent in the third tier.

On 10 January 2002, the club was re-organized and a new management was elected, consisting of: Gyula Derzsi (president) and Levente Hodor (vice-president). During this general assembly the association was renamed again as KSE Târgu Secuiesc and the sports club that already included football, basketball and bowling sections was expanded with radio amateurs and chess sections. One year later, the mountaineering / caving and athletics departments were added in the sports society organizational chart.

KSE promoted to Divizia C in 2004, but relegated again after three weak seasons in which the club was a common name of the last places. After this relegation, for KSE followed one of the weakest periods in the club's history, "the white and blues" spending no less than 10 years in the county leagues. At the end of the 2016–17 season, KSE won Covasna County League, then the promotion play-off against Pro Mureșul Toplița (9–0 on aggregate) and returned, once again, in the Liga III.