- September 10, 1946: Hagerstown Junior College is founded becoming the first rural community college in Maryland. 

- September 18, 1946: HJC holds its first classes. 

- June 1, 1948: First commencement is held presenting degrees to 25 students.

- December 8, 1948: Dr. James W. Mileham is appointed dean of the college.

- January 1951: First alumni organization formed.

- January 1953: Atlee C. Kepler appointed dean of the college.

- September 1956: HJC moves to the South Hagerstown High School campus.

- Fall 1956: Irv Easterday named director of athletics.

- 1961: Dr. Kepler named president of Hagerstown Junior College.

- September 19, 1966: The first classes are held at the Robinwood Drive Campus with a total enrollment of 782 students

- Fall 1966: The first non-credit classes are offered. 

- 1968: Hagerstown Junior College Foundation formed. 

- January 1968: HJC takes over nursing program from Washington County Hospital.

- October 1978: Kepler Theater opens.

- July 1, 1986: Dr. Norman Shea appointed second College President.

- 1988: Athletic, Recreation and Community Center opens on campus.

- 1989: Old gymnasium transformed into the Advanced Technology Center. 

- 1994: Technical Innovation Center opens.

- 1995: The college opens a satellite location at the Valley Mall.

- 1996: College credit enrollment increases to 3,000 students.

- July 1, 1998: HJC becomes Hagerstown Community College

- Fall 2000: HCC Alumni Amphitheater opens

- Fall 2000: Learning Resource Center opens, featuring the William Brish Library.

- July 2002: Dr. Guy Altieri appointed as third College President.

- 2002: Former HCC Library is renovated and opens as the College Center.

- Fall 2003: ESSENCE Program begins.

- January 2004 – HCC becomes home to Washington County’s Adult Education Program.

- Fall 2005: HCC offers more than 100 programs of study, up from 40 in 2002.

- 2009: Renovated Career Programs Building opens, with Merle S. Elliott Continuing Education and Conference Center. 

- 2012: STEM Building and Kepler Performing and Visual Arts Education Center open. 

- 2013: Behavioral Sciences and Humanities Building, Fletcher Faculty Development Center, and Learning Support Center opens. 

- August 2013 – HCC launches STEMM Technical Middle College.

- 2015: Expanded and renovated Student Center opens. 

- Fall 2015: The roundabout at the Robinwood Drive entrance is complete. 

- 2016: Yale Drive entrance opens.

- 2018: Dr. James Klauber appointed as fourth College President.

- 2019: Energy and Trades Training Center opens.

- April 2019: HCC announces the official start of its campaign to establish Washington County as the first ACT Work Ready Community in Maryland. 

- 2021: Center for Business and Entrepreneurial Studies opens.