Tragumna, Sandy beach in County Cork, Ireland.

Tragumna is a small hamlet and beach in the civil parish of Castlehaven, about 5 km from Skibbereen in County Cork. The beach looks out on Drishane Island, roughly 100 metres offshore, and a small lake, Lough Abisdeally, lies nearby.

Tragumna takes its name from the Irish Tráigh Omna, glossed in one source as 'strand of the oak (trunk)'; a Russian-language source gives the Irish form Tráig na Móna, 'turf bank'. The hamlet lies in the civil parish of Castlehaven, about 5 km from Skibbereen in County Cork, and its small beach was awarded a Blue Flag for 2019 and 2020.

The beach received the Blue Flag certification in 2019 and 2020, recognizing its high environmental standards and water quality measures.

Tragumna lies about 5 km from Skibbereen in the civil parish of Castlehaven. The beach faces Drishane Island, roughly 100 metres offshore, and a small lake, Lough Abisdeally, is nearby. Lough Hyne, a designated Marine Nature Reserve, is 3 km away.

In March 2024, ten people of various nationalities were arrested after surveillance of a suspected drug smuggling attempt at Tragumna pier. The arrests followed monitoring of the small pier rather than the beach itself.