Johanna Bennett (September 30, 1984 in Peterborough, Cambridgeshire) is a British songwriter and member of now-defunct band Totalizer. She was the lead vocalist. She has a Trinidadian mother and an English father.

Johanna co-wrote the Arctic Monkeys single "Fluorescent Adolescent" with her then boyfriend Alex Turner, lead singer of the band. The song lyrics were developed during a word game while the couple was on vacation. This led to Johanna securing a publishing deal with EMI.

Bennett was the frontwoman of the band Totalizer, whose demos were produced by Dirty Pretty Things guitarist Anthony Rossomando. The band played several shows and folded in November 2007.