Dennis Lynn Heck (born July 29, 1952) is an American politician serving as the 17th lieutenant governor of Washington, since 2021.

Following redistricting, Washington added a 10th congressional district in which Heck lived representing Pierce, Thurston, and Mason counties.

Heck was born in Vancouver, Washington in 1952 and raised in the Lake Shore area of Clark County.

Upon Governor Gardner's retirement in 1995, Heck and a friend and colleague, Stan Marshburn, co-founded TVW, a nonprofit statewide public affairs network for Washington State patterned after C-SPAN.

[4][5] He helped found Digital Efficiency, which specialized in aiding businesses and medical facilities in transitioning toward an all-digital format.

In 2003, Heck concentrated on helping to build a for-profit company he had founded specializing in business oriented education and training programs.

Heck served as the host for the TVW public affairs show Inside Olympia in the late 1990s and early 2000s.

[12] In the general election on November 6, 2012, Heck defeated Republican challenger Dick Muri to become the district's first congressman.

Since 2013, Heck and Representative Ed Perlmutter have introduced legislation to improve access to banking and financial services for cannabis businesses.

[25] In the nonpartisan primary in August 2024 he led, with 48.65% of the vote, Republican challengers Dan Matthews (23.0%) and Bob Hagglund (16.7%).