The parish church is dedicated to Saint Leonard and is a Grade I listed building dating from the 11th century, with later additions, and a restoration in 1873. It is built of chalk and greenstone with red-brick patching. The blocked north door is late 12th-century, with both the font and the south door 14th-century. On the south wall there is an alabaster wall plaque to Sir Charles Bolle, who died in 1690, and on the north wall a large wall monument to Sir John Bolle, who died in 1606.
- "Haugh". Vision of Britain. University of Portsmouth. Retrieved 29 July 2011.
- "Haugh". Domesday Map. Anna Powell-Smith/University of Hull. Retrieved 29 July 2011.
- Historic England. "St Leonards church, Haugh (1168562)". National Heritage List for England. Retrieved 29 July 2011.
- Historic England. "Manor Farmhouse, Haugh (1063594)". National Heritage List for England. Retrieved 29 July 2011.
- Media related to Haugh, Lincolnshire at Wikimedia Commons