Walter Hekster (29 March 1937 – 31 December 2012) was a Dutch composer, clarinetist and conductor, specializing in contemporary classical music. He performed as a clarinetist in the Netherlands Wind Ensemble and the Connecticut Symphony Orchestra.
He was professor of clarinet and composition at Brandon University in Manitoba and also taught at several music conservatories in the Netherlands until 1990. Walter Hekster was an extremely productive composer, creating music for a wide range of orchestral and chamber music settings. 134 of his works are published by Dutch music publishing house Donemus.