John Charles Olmsted was an American landscape architect. The nephew and adopted son of Frederick Law Olmsted, he worked with his father and his younger half-brother, Frederick Law Olmsted Jr., in their father's firm. After their father retired, the brothers took over leadership and founded Olmsted Brothers as a landscape design firm. The firm became well known for designing many urban parks, college campuses, and other public places. John Olmsted's body of work from over 40 years as a landscape architect has left its mark on the American urban landscape.