Groggan (from Irish: an Grógán) is a hamlet and townland near Randalstown in County Antrim, Northern Ireland. It is situated in the historic barony of Toome Upper and the civil parish of Drummaul and covers an area of 620 acres. It is within the Borough of Antrim. It had a population of 135 people (54 households) in the 2011 Census. (2001 Census: 123 people)