Luke Esser (born August 26, 1961) is an American attorney, journalist, and politician who served as the chairman of the Washington State Republican Party from 2007 to 2011.

He was elected on January 27, 2007, when he defeated incumbent chairwoman Diane Tebelius, was re-elected in 2009, but lost to Kirby Wilbur in 2011.

In the 2004 Republican primary for the eighth Congressional district of Washington he finished third, behind Diane Tebelius and King County Sheriff Dave Reichert.

Esser lives in East Bellevue, Washington and attended St. Louise Parish Catholic Church.

He is a graduate of Interlake High School and three times from the University of Washington: Double majored in Editorial Journalism & Accounting, earned a J.D.