Laxg̱alts'ap /læxˈɑːldzæp/ (also Laxqalts'ap, and formerly Lachkaltsap or Greenville) is a Nisga'a Village of approximately 474, in the Nass River valley of British Columbia, Canada. It is one of the four main villages in the Nisga'a Lisims, the formal name for their territory, and is situated on the north side of the Nass River between Gitwinksihlkw to the east and Gingolx to the west. It is approximately 24 km from where the Nass empties into the Pacific Ocean at Nass Bay.