Keith Ross Lowen (born 14 July 1974) is a former New Zealand rugby union player.
A second five-eighth, Lowen represented Waikato at a provincial level for most of his career, and was a member of the New Zealand national side, the All Blacks, in 2002.
He played one international for the All Blacks against England.
Lowen scored a hat-trick for the Chiefs against the Blues in a Super 12 match in 2001.