Although most people stay in Częstochowa only for one-two days, however, we advise you to book a hotel in advance. In summer (especially on August 15) and during holidays (especially those related to the Marian devotion), hotels in Częstochowa are usually booked.
We suggest two apartment-hostel in the city centre:
Apartamenty Stara Kamienica Częstochowa, ul. Dąbrowskiego 10 +48 791 133 033
Nowa Kamienica Apatramenty Hotel - ul. Szymanowskiego 22A, 42-217 Częstochowa +48 34 378 80 78
But you are free to choose one of the hotels in the city centre, the one better suits you