Loch Arbour is a village in Monmouth County, New Jersey, United States. As of the 2010 United States Census, the village's population was 194, reflecting a decline of 86 (-30.7%) from the 280 counted in the 2000 Census, which had in turn declined by 100 (-26.3%) from the 380 counted in the 1990 Census. As of 2010, Loch Arbour was the third-smallest municipality in New Jersey in terms of area (behind Shrewsbury Township and East Newark) and was the fifth-smallest municipality by population in the state of New Jersey.