"Hyperactive!" is a single by British musician Thomas Dolby, taken from his second album The Flat Earth, released in 1984. Additional vocals were provided by Louise Ulfstedt.

According to Thomas Dolby, he initially composed the song for Michael Jackson, whom he met in 1982. He decided to record it by himself since he never got any feedback from Jackson after sending him a demo tape.

It was the first single to be taken from the album and peaked at #17 on the UK Singles Chart and #16 on the Canadian RPM Magazine charts, but only reached #62 on the US Billboard Hot 100, while his most popular single in the U.S., "She Blinded Me With Science" (#5 on the Hot 100), did not reach the Top 40 in the UK. A remix was also done of the song, which became quite popular in clubs and on dance charts. It was featured on the 2002 video game Grand Theft Auto: Vice City, on the New Wave station Wave 103.