Castlepoint is a small beachside town on the Wairarapa coast of the Wellington Region of New Zealand. It is home to a lighthouse which stands near the top of the northern end of a reef. The reef is about one kilometer long. At the southern end of the reef, there is an island known locally as "seagull island", due to its large population of seagulls. The southern side of Castle Rock is known as Christmas Bay. Castlepoint is approximately one hour's drive from Masterton.