Olo or OLO may refer to:
Geography
- Olo, South Sudan, a town in South Sudan
- Olo language, a language of Papua New Guinea
People
- Olo, Ale the Strong, a mythological king of Sweden
- Audovald and Olo, two generals in the Frankish campaign against the Lombards under kings Guntram and Childebert II
Business
- Olo (online ordering), a United States online food ordering company
- On Line Opinion, an online journal in Australia
- Olo (restaurant), a Michelin starred restaurant in Helsinki, Finland
Other
- Olo board, a Hawaiian surfboard
- Ontario L'Orignal Railway
- Olo n:o 22, an outdoor sculpture in Helsinki
- Olos (album)
- OLOS (obstructed-line-of-sight), see Non-line-of-sight propagation
Abbreviations and codes
- OLO, Obligation Linéaire(fr)/Lineaire Obligatie, which is the most common kind of Belgian sovereign bond
- OLO, Ohio Light Opera, an opera company in Ohio, USA
- Opera Lyra Ottawa, an opera company in Ontario, Canada
- Livvi-Karelian language, which is denoted as "olo" in the ISO 639 3 language codes
- Oslo Laptop Orchestra (OLO)
- OLO, UCI team code for Omega Pharma–Lotto, a cycling team
- The Official Languages Ordinance (Cap. 5) of Hong Kong
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