Yasuo Fukuda (福田 康夫, Fukuda Yasuo?, born 16 July 1936) was the 91st Prime Minister of Japan, serving from 2007 to 2008. He was previously the longest-serving Chief Cabinet Secretary in Japanese history, serving for three and a half years (2000–2004) under Prime Ministers Yoshiro Mori and Junichiro Koizumi.

Following the resignation of Prime Minister Shinzo Abe, Fukuda was elected as President of the Liberal Democratic Party and became Prime Minister in September 2007. Fukuda was the first son of a former Japanese Prime Minister (Takeo Fukuda) to also take up the post.

On 1 September 2008, Fukuda announced his resignation, triggering another LDP leadership election. Although Japan hosted the G8 summit meeting without mishap during Fukuda's time in office, Fukuda himself earned little or no credit from ordinary Japanese, and when he resigned, he became the first of the G8 leaders to leave office.