Ulla Katajavuori (16 June 1909, Rauma – 5 October 2001 Helsinki) was a Finnish musician who played the traditional Scandinavian kantele, performing from the 1930s to the 1990s.

A kantele (harppu in Sami) is a traditional plucked string instrument of the dulcimer and zither family native to Finland and Karelia.

Katajavuori played the modern, multi-stringed version of the kantele, and was considered a virtuoso and maintainer of the tradition, especially during the 1960s when the instrument was of low popularity, and 5-string player Martti Pokela was one of the few other recognised musicians playing the instrument.
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