Nowy Dwor Mazowiecki Women

Promotion to the Tauron Liga came in 2025, when LOS finally won the I Liga after three years of knocking on the door — third place in 2021/2022, runners-up the following season, third again in 2023/2024, and then, at the fourth attempt, first. It was that patience, more than any single season, that carried the club into the Polish top flight, where it finished twelfth in its debut year in 2025/2026.

The path up started further down. Founded on 22 July 2015, the club spent its early years as NOSiR Nowy Dwór Mazowiecki, took the LOS name in 2021, and since 2023 has played as EcoHarpoon NOWEL LOS Nowy Dwór Mazowiecki, though LOS has stuck as the name people use. The II Liga title in 2019/2020 was the first real marker, the promotion that got them into the second tier in the first place.

Bartosz Kujawski has coached the side since at least 2020, through the whole climb from the second tier to the top division. Among the players who have worn the shirt, Krysten Garrison and Paulina Reiter are the names most associated with the club's rise, while the squad has also leaned on academy products such as Barbara Zakościelna, who came through Sparta Grodzisk Mazowiecki and Legionovia before joining the senior team.

Matches against MOYA Radomka Radom carry the weight of a regional rivalry, fought out as the Masovia Derby; Legionovia used to supply the other side of that fixture before dropping away. In the Polish Cup, the club's best runs have stopped at the quarter-finals, in 2019/2020 and again in 2021/2022.

LOS now plays its first season among Poland's elite, at the Hala Widowiskowo-Sportowa NOSiR, with survival in the Tauron Liga the immediate task after finishing twelfth.