Tomioka may refer to:
- Tomioka, Fukushima, a town in Fukushima Prefecture
- Tomioka Station, a railway station
- Tomioka, Gunma, a city in Gunma Prefecture
- Tomioka silk mill
- Tomioka Castle
- (born 2002), singer-songwriter
- (born 1964), professional shogi player
- (1932–2007), Japanese cyclist
- , fictional character from the manga Demon Slayer: Kimetsu no Yaiba