Ackergill Tower (or Ackergill Castle) is located on the coast of Sinclair's Bay, about 4 km north of Wick, Caithness, in northern Scotland. It was built in the early 16th century, and is a category A listed building. The building is a five-storey oblong tower house. The four-storey wing to the rear was added in the early 18th century. From 2014, Ackergill Tower was operated as an events and wedding venue by AmaZing Venues, before being sold to US philanthropist, Dr Betsee Parker in February 2019.