Nissi Parish (Estonian: Nissi vald) is a rural municipality in northern Estonia. It is a part of Harju County. The municipality has a population of 3,281 (as of 1 January 2007) and covers an area of 264.9 km². The population density is 12.386/km2 (32.079/sq mi). The current mayor (vallavanem) is Peedo Kessel.