Ruka may refer to:

People
, Japanese actress
, Japanese football player
, Japanese snowboarder
, Japanese professional footballer

Other
 Ruka (Okage), a playable character from Okage: Shadow King
 Rukatunturi (), a ski resort in Finland
 Ruka Souen, a character from the anime and manga series Vampire Knight
 Ruka (house type), a traditional Mapuche house type
 Ruka, a character from the anime and manga series YuYu Hakusho
 Ruka, a playable character from Fire Emblem Gaiden
 Ruka, a playable character from Tear Ring Saga
 Ruka (film), 1965 Czech animated short film also known as The Hand
 Ruka Sarashina, a character from the anime and manga series Rent-A-Girlfriend

See also
 Luka (given name), another Japanese transliteration

Japanese feminine given names
Feminine given names
Japanese unisex given names