Hendrik Johannes "Rik" Grashoff (born 5 April 1961, in Krimpen aan den IJssel) is a Dutch engineer and politician. He is a member of the political party GreenLeft. From 23 November 2010 to 19 September 2012 he was a member of the House of Representatives. He focused on matters of agriculture, defense and public administration. On 20 May 2015 he returned to the House and took up the seat of Bram van Ojik.