OBP may stand for:
- One Broadway Plaza, potential site of the tallest building in Orange County, California
- One Bayfront Plaza, a planned/approved skyscraper in Downtown Miami
- On-base percentage, a baseball statistic
- OpenBoot, also known as "Open Firmware", the low-level firmware in Sun Microsystems, Inc. machines
- Orange-bellied Parrot, a critically endangered bird species from Australia
- One Bad Pig, a Christian punk band from Austin, Texas
- Odorant-binding protein, olfaction; proteins
- Objectieve Bierproevers ("Objective beer-tasters"), an organisation for consumers of beer in Belgium, now superseded by Zythos
- Osaka Business Park, a business district in Osaka, Japan