Kaia Bruland Nilssen (1868 – 18 January 1950) was a Norwegian novelist.
Beginning in 1895, she published several novellas and novels, and occasionally poems.
She has been noted as writing non-pretentious trivial literature for a female audience.
The book Aagot Vangen - et livsbillede from 1903 is a biographical novel about the Norwegian sculptress Aagot Vangen, who received her artistic education in Paris but died when still in her twenties.
Kaia Bruland-Nilssen's most popular book was 1897's Sjøgutten.
She also contributed to the scandal sheet Spidskuglen.She resided near Bekkestua in Bærum.