George Ulick Browne, 6th Marquess of Sligo and 4th Earl of Clanricarde (1 September 1856 – 26 February 1935), styled Earl of Altamont until 1913, was an Irish peer.

[1] Born 1 September 1856, Browne was the eldest son of Henry Browne, 5th Marquess of Sligo, and his wife Catherine Henrietta Dicken.

He succeeded to the marquessate in February 1913, aged 56, on the death of his father.

[3] In 1921 he attended the first meeting of the short-lived Senate of Southern Ireland.

[5] In 1924, when visiting British Hong Kong, the Marquess of Sligo succeeded in getting a specimen of the South China giant salamander sent to London Zoo.