Olszewka

Olszewka may refer to the following places:
 * Olszewka, Nakło County in Kuyavian-Pomeranian Voivodeship (north-central Poland)
 * Olszewka, Ciechanów County in Masovian Voivodeship (east-central Poland)
 * Olszewka, Ostrołęka County in Masovian Voivodeship (east-central Poland)
 * Olszewka, Przasnysz County in Masovian Voivodeship (east-central Poland)