Omi
- Eight Views of Ōmi
- Horace Ridler
- HtrA serine peptidase 2
- IBM i
- Kōji Omi
- Missionary Oblates of Mary Immaculate
- OMI Rotterdam
- OMI cryptograph
- Omi (given name)
- Omi (singer)
- Omi (title)
- Omi Shrine
- Omi language
- Omi, Nagano
- Omidiyeh Air Base
- Oocyte maturation inhibitor
- Open Management Infrastructure
- Open Music Initiative
- Optical Mechanics, Inc.
- Original Musical Instrument Company
- Ottico Meccanica Italiana
- Ozone monitoring instrument
- Power10
- Shigeru Omi
- Takayuki Omi
- Tomoe Ohmi
- Toshinori Omi
- Toshiya Omi
- Xiaolin Showdown
- Yukitaka Omi
- Yurie Omi
- Yusuke Omi
- Ōmi Code
- Ōmi Province
- Ōmi no Mifune