Wemyss Bay Holiday Park is a large holiday park in Renfrewshire, Western Scotland, owned by Parkdean Resorts. It occupies a 150-acre wooded site built on the grounds where Kelly Castle once stood before it burned down in 1740.

The park sits opposite the Wemyss Bay railway station and ferry terminal, providing easy access to the nearby isles of Bute and Arran.

The park offers a wide range of on-site facilities including an indoor heated pool, sauna, bar and grill, café, convenience store, games rooms, and play areas. It holds a David Bellamy Conservation Award and a Scottish Tourist Board 4-star rating.

Accommodation includes privately owned and letting caravans as well as lodges, with the season running from early February to mid-December.