The 1990 Triple J Hottest 100, also known as the 1990 Triple J Hot 100, was announced on 20 May 1990. It was the second annual poll of the most popular songs of all time, according to listeners of the Australian radio station Triple J. From 1989 to 1991, listeners could vote for songs released in any year.
This was the final countdown to be referred to as a "Hot 100" as Triple J was later forced to change the poll's name to 'Hottest 100' to avoid legal action with 4ZZZ.