New Jewish cemetery in Ostrow Mazowiecka on Wolodyjowskiego St. was established in the beginning of 20th century. Most probably there are about 5 matzevot left on the cemetery. The cemetery is 2.05 ha.

Old Jewish cemetery in Ostrow Mazowiecka on bifurcation of Targowa and Broniewskiego St. was established in the end of 17th century. There are no fragments of matzevot left. The cemetery is 1.94 ha.