US Thionville Lusitanos, officially Union Sportive Thionville Lusitanos, is a French football club based in Thionville in the Grand Est region. The present organisation was created in 2021 through the merger of Thionville FC and AS Portugais Saint-François, bringing together two local football traditions under a new identity. The club's official website describes USTL as a football club founded in 2021, while the French Football Federation recognises the club within the Grand Est football structure. The club has experienced an exceptional rise through the French football pyramid since its creation. The senior men's team began at Regional 2 level and progressed through the divisions under head coach Julien François. In the 2025–26 season, Thionville competed in Championnat National 2 and secured the Group B championship, earning promotion to the newly established Ligue 3 for the 2026–27 season. The French Football Federation described the achievement as four promotions in five seasons, highlighting the speed of the club's sporting development. The 2026–27 season represents a major milestone because USTL enters Ligue 3 and therefore the professional level of French football for the first time in its history. The club's official website now features Ligue 3 prominently and provides fixtures, results, news, ticketing and club information for the new season. Alongside its senior men's team, USTL operates a wider football structure including youth and women's football. The club's official communications regularly cover its academy teams, U17 National side, women's sections and Regional 1 senior team. Its recruitment activities also emphasise the development of young players, football education and the strengthening of its coaching and volunteer network. USTL's home football facilities include Stade de Guentrange, Stade Jeanne d'Arc and Stade de la Plaine. The French Football Federation lists the club's headquarters at 6 Route de la Sportive, while the club's current official website gives its contact address as 120 Route Guentrange, 57100 Thionville. The organisation's LinkedIn profile identifies USTL as a nonprofit sports-club organisation headquartered in Thionville, with a reported company size of 2–10 employees.