Olmsted is a surname. People with the name include:

• The notable Olmsted family of New York City:
  • Frederick Law Olmsted, American landscape architect
    • his sons John Charles Olmsted and Frederick Law Olmsted Jr., also landscape architects, and their company Olmsted Brothers
    • John Charles Olmsted (1852–1920), landscape architect, adopted son of Frederick Law Olmsted
  • Frederick Olmsted Jr. (1911–1990), WPA artist, muralist, and scientist (son of Frederick E. Olmsted)
  • Frederick E. Olmsted (1872–1925), American Forester (nephew of Frederick Law Olmsted)
  • George W. Olmsted (b. 1874), founder of Long Island Lighting Company (LILCo), patron of the Chief Cornplanter Council, Boy Scouts of America
  • George H. Olmsted (b. 1901), veteran of World War I and World War II, General in the United States Army, life insurance magnate, and philanthropist
• Aaron Olmsted, investor in the Connecticut Land Company in the United States
• Andrew J. Olmsted, a U.S. soldier during the Iraq occupation
• Anna Wetherill Olmsted (1888–1961), American museum director and art critic
• Charles M. Olmsted (1881-1948), an American aeronautical engineer
• Dan Olmsted, a senior editor for United Press International (UPI) and author of the Age of Autism reports
• David Olmsted (1822–1861), an American politician
• Denison Olmsted, an American astronomer
• Elizabeth Martha Olmsted (1825–1910), American poet
• John Olmsted (naturalist) (1938–2011), an American naturalist and conservationist
• John W. Olmsted (1903–1986), an American historian
• Nathan Olmsted (1812-1898), an American politician
• Richard Olmsted (settler) (died 1686/7), early New England (Connecticut) settler
• Thomas Olmsted, an American prelate of the Catholic Church
• Katharine (Kit) Olmsted (2001-), an American amateur athlete, NCAA Division I Champion