Leybourne Castle is a 13th-century castle in the parish of Leybourne, Kent. It is situated between West Malling and Larkfield. The two semi circular bastions of the twin towered gatehouse built in 1275 remain and are incorporated into a Tudor farmhouse that was extensively rebuilt around 1930. Some evidence of circular earthworks also remains. The curtain wall was extant until the 18th century but now none of it remains.
It is a Grade II* listed building. 
- "Name: LEYBOURNE CASTLE List entry Number: 1363097". English Heritage. Retrieved 10 March 2015.
- Leybourne Castle page at The Gatehouse
- Leybourne Castle page at Ecastles.co.uk
- History of the castle
- National Monuments Record for Leybourne Castle
- Architectural description of Leybourne Castle
- Exploring Kent's past, Kent County Council
- "From Old Books"