What are the Ottawa, Pennsylvania Zip Codes for 2020, 2019Primary Zip Codes for OttawaZip CodePrimary CitySecondary City17821DanvilleOttawa, Danville East, Deiblers, Exchange, Grovania, Kaseville, Mahoning, Mausdale, Mooresburg, Ridgeville, Rushtown, Strawberry Rg, Valley, West HemlockCities sharing Zip Codes with OttawaZip CodePrimary CitySecondary CityMore Information17821DanvilleDanville East17821DanvilleDeiblers17821DanvilleExchange17821DanvilleGrovania17821DanvilleKaseville17821DanvilleMahoning17821DanvilleMausdale17821DanvilleMooresburg17821DanvilleOttawa17821DanvilleRidgeville17821DanvilleRushtown17821DanvilleStrawberry Rg17821DanvilleValley17821DanvilleWest HemlockAdvertisements