This is the timeline of Hersheypark. To simplify the list into shorter pages, this is organized by the different eras of the park over the years.
1903 – 1922 | The Early Years
1903-1910: The First Years of Hersheypark
1911-1922: The Great War and Post-War Troubles
1923 – 1944 | The Summer Playground of Pennsylvania
1931-1944: Great Depression and World War II
1945 – 1970 | Beyond Mr. Hershey
1945-1959: Postwar America & Stagnation
1971 – 1995 | Theme Park Evolution
1978 – 1983: Outside Influences
1984 – 1995: Pioneer Frontier Expansion
1996 – 2019 | The Midway Expansion
1996 – 2002: The Midway Expansion
2010 – 2019: Something Old & Something New
2020 – future | Ballroom Dancing
2020 – future: Proposed expansion into old Pool and Ball Room region