Olmstead may refer to:
- Persons
- Bert Olmstead, Canadian ice hockey player
- Denison Olmstead, American astronomer
- Marla Olmstead, abstract artist
- Matt Olmstead, American writer and producer for television shows
- C. Michelle Olmstead, American astronomer
- Roy Olmstead, famous bootlegger during American prohibition
- Robert Olmstead, American novelist and educator
- Case law
- Olmstead v. United States, a decision of the United States Supreme Court concerning the legality of wiretapping by government officials
- Olmstead v. L.C., a decision of the United States Supreme Court defining mental illness as a disability covered under title II of the Americans with Disabilities Act
- Other
- Lake Olmstead Stadium, stadium in Augusta, Georgia used primarily by the Augusta GreenJackets baseball team