Simmu Tiik (born 19 February 1959 in Tartu) is an Estonian diplomat and is the current Ambassador of the Republic of Estonia to Norway and Iceland.
From 2003 to 2006, Tiik was the Ambassador of Estonia to the Republic of Ireland, and from 2009 to 2012 the Ambassador of Estonia to Russia. On 30 July 2012, Tiik was appointed as the Ambassador of Estonia to Norway and Iceland.