Joseph Koo MBE, GBS (25 February 1932 - 3 January 2023) was a Hong Kong composer.

Koo joined TVB as their director of music in 1973, where from the late 1970s until immigrating to Canada in the 1990s, he collaborated with the lyricist James Wong on many memorable TV theme songs. Koo composed over 1,200 songs in his career, many of his songs are now considered as classic Cantopop.

Koo received Member of Order of the British Empire (MBE) in 1982. In 1998, he received the Bronze Bauhinia Star from the Hong Kong Government. He also received other awards including Music Accomplishment Award (from Composers and Authors Society of Hong Kong Ltd.), Highest Honour Award (from RTHK Ten Best Chinese Music Program), Best Music Award and Best Lyric Award (from Asia Film Festival), Hong Kong Film Awards, Taiwan's Golden Horse Film Festival and Awards and many others.