Allerton Garden, also known as Lāwaʻi-kai, is a botanical garden, originally created by Robert Allerton and John Gregg Allerton, located on the south shore of Kauai, Hawaii. The garden covers an 80-acre (320,000 m2) area and is situated beside the Lāwaʻi Bay, in a valley transected by the Lāwaʻi Stream. It is one of the five gardens of the non-profit National Tropical Botanical Garden.
Queen Emma of Hawaii resided above this valley for a short interval, and a modest house that was perhaps her residence has subsequently been moved to the valley floor and renovated. The entire valley, including what is now the adjacent McBryde Garden, was purchased by the McBryde family in the late 19th century for a sugarcane plantation.