Dennis Dellwo (born August 31, 1945) is an American politician who served in the Washington House of Representatives from the 3rd district from 1983 to 1996.
On November 6, 2012, Dellwo unsuccessfully ran for Washington House of Representatives for District 6. Dellwo was defeated by Jeff Holy. Dellwo received 45.16% of the votes.
Dellwo's wife is Lynnette Dellwo. They have six children. Dellwo and his family live in Spokane, Washington.