Sumi may refer to:
People
- Names
- Sumi Haru (1939–2014), American actress
- Sumi Hakim (born 1944), Indonesian fashion designer and former model
- Sumi Helal, Egyptian computer scientist
- Sumi Hwang (born 1986), South Korean soprano
- Sumi Jo (born 1962), South Korean lyric coloratura soprano
- Sumi Khadka (born 1978), Nepalese actress and beauty queen
- Sumi Shimamoto (島本 須美, born 1954), Japanese actress
- Sumi Tonooka (born 1956), American jazz pianist and composer
- Surnames
- Azusa Sumi (鷲見 梓沙, born 1996), Japanese long-distance runner
- Eiji Sumi (隅 英二, born 1970), Japanese artist
- Hansjörg Sumi (born 1959), Swiss former ski jumper
- Koshiro Sumi (角 昂志郎, born 2002), Japanese footballer
- Peter Šumi (1895–1981) Yugoslav gymnast
- Reina Sumi (鷲見 玲奈, born 1990), Japanese freelance announcer
- Sharmin Sultana Sumi, Bangladeshi singer-songwriter
- Shreyaa Sumi (born 1987), Indian-American model
Fictional characters
- Sumi Sakurasawa, a character in the manga and anime series Rent-A-Girlfriend
Places
- Bani Sumi', a sub-district in Taiz Governorate, Yemen
- Sumi Furasawa Site, an archaeological site, in Kanto, Japan
Cultures
- Sümi Naga, one of the major Naga ethnic groups in Nagaland, India
- Sümi language, a Sino-Tibetan language spoken in India
Cinema
- Sumi (film), a 2022 Indian film
Sport
- Sumi, of Miga, Quatchi, Sumi and Mukmuk, the mascots of the 2010 Winter Olympics and Paralympics
- Sumi gaeshi, one of the 40 original throws in judo
- Sumi otoshi, one of the original 40 throws in judo
Other uses
- Inkstick or Sumi ink, Japanese solid ink
- Ink wash painting or Sumi-e, Japanese ink wash painting
- Software Usability Measurement Inventory (SUMI), a questionnaire for assessing quality of use of software by end users
- Sumi, an honorific for Buddhist monks