Olszewo may refer to the following places: Olszewo, Gmina Boćki in Podlaskie Voivodeship (north-east Poland) Olszewo, Gmina Brańsk in Podlaskie Voivodeship (north-east Poland) Olszewo, Łomża County in Podlaskie Voivodeship (north-east Poland) Olszewo, Siemiatycze County in Podlaskie Voivodeship (north-east Poland) Olszewo, Łódź Voivodeship (central Poland) Olszewo, Masovian Voivodeship (east-central Poland) Olszewo, Konin County in Greater Poland Voivodeship (west-central Poland) Olszewo, Kościan County in Greater Poland Voivodeship (west-central Poland) Olszewo, Gmina Środa Wielkopolska, Środa County in Greater Poland Voivodeship (west-central Poland) Olszewo, Działdowo County in Warmian-Masurian Voivodeship (north Poland) Olszewo, Gmina Prostki in Warmian-Masurian Voivodeship (north Poland) Olszewo, Gmina Stare Juchy in Warmian-Masurian Voivodeship (north Poland) Olszewo, Mrągowo County in Warmian-Masurian Voivodeship (north Poland) Olszewo, Nidzica County in Warmian-Masurian Voivodeship (north Poland) Olszewo, Olecko County in Warmian-Masurian Voivodeship (north Poland)