| 1918 | Professor Everett V. Meeks presents lectures on the history of planning |
| 1928–30 | William Schuchardt teaches city planning seminar |
| 1935 | First regional planning classes taught under Carnegie Corporation grant in a joint architecture and engineering program |
| 1943 | First full planning cohort graduates, including John Reps |
| 1952 | First Ph.D. degree awarded to Robert Hoover |
| 1956 | First woman planning graduate, Sobhagya Komarakul* |
| 1960s | International activities expand in the department |
| 1962 | Cornell starts offering courses in historic preservation |
| 1971–75 | Department splits into two: Urban Planning and Analysis and Policy Planning and Regional Analysis |
| 1972 | Regional Science program established |
| 1975 | Historic Preservation becomes a major concentration |
| 1976 | Departments merged |
| 1981 | Undergraduate program started as two-year major; expanded to four-year degree in 1987 |
| 1984 | Department celebrates 50th Anniversary |
| 1987 | First tenured woman faculty member (Lourdes Beneria) and two tenure- track faculty hired (Susan Christopherson and Margaret Wilder) |
| 1988 | CRP joins Cornell in Rome program |
| 1997 | Real Estate program established |
| 1998–99 | First major expansion of the department in 10 years: Three tenure-track faculty hired (Ann-Margaret Esnard, Rolf Pendall, and Mildred Warner) |
| 2005–07 | Second major expansion of the department: Three tenure-track faculty hired (Stephan Schmidt, Clement Lai, and Arturo Sanchez), two tenured professors hired (Ann Forsyth and Kieran Donaghy) |
| 2010 | Department celebrates 75 years of transforming planning |
Past AAP Deans from Planning
| 1938–50 | Gilmore D. Clark |
| 1951–60 | Thomas W. Mackesey |
| 1960–71 | Burnham Kelly |
| 1971–80 | Kermit C. Parsons |
| 1983–84 | Ian Stewart, Acting Dean |
| 1998–04 | Porus Olpadwala |
