Michael Duncan Smither (born 29 October 1939) is a New Zealand painter and composer.He was born in New Plymouth and was educated at New Plymouth Boys' High School and Elam School of Fine Arts, Auckland.
While studying he worked part-time in a car spray-paint shop, an occupation which introduced Smither to the use of lacquer-based paints.
In 1959, Smither returned to New Plymouth, working part-time in arts-related jobs.
His first solo exhibition was in 1961.
In 1963 he married Elizabeth Harrington, who is better known as New Zealand Poet Elizabeth Smither.
The two have three children, Sarah, Thomas and Joseph.
Smither separated from Elizabeth and eventually divorced.
For a few years he was married to Rachel McAlpine, a writer.
Smither now lives at Otama beach on the Coromandel Peninsula.
Smither was also influenced by Rita Angus and Lois White as he was studying.