1885	Ellis Memorial Club is founded by Miss Ida Eldredge and named for Dr. Rufus Ellis, minister of the First Church, Boston. It is the first non-sectarian boys club in Boston, primarily serving as a shelter for newsboys, and located in one room at 241 Tremont Street, near today's New England Medical Center.
1887	The club moves to larger quarters (two rooms) at 3 Boylston Street, near the corner of Tremont Street and the Boston Common.
1890	The club rents half a house at 49 Providence Street, between Boylston and St. James Street near the Public Garden.
1893	A debating class and the Ellis Reading Room are added, with the reading room later becoming a public library branch.
1896	Due to high demand, a girls club is added and meets one evening a week.
1900	The Ellis Memorial & Eldredge House incorporates, with by-laws adopted and officers elected. A house is purchased al 12 Carver Street (near the location of today's Massachusetts Transportation building).
1901	A monthly mothers meeting is established. The Little Children's Club is divided into two groups due to high demand: Saturday morning for girls, Saturday afternoon for boys.
1902	The Mothers Club is formed, meeting weekly. Ellis Memorial helps develop a sand garden for children in the Public Garden. Jane McCrady becomes the first kinder­garten teacher, and later serves as Ellis's director for 35 years.
1903	Ellis Memorial establishes a summer camp at Mirror Lake, New Hampshire, with an attendance of fifteen boys.
1904	An Afternoon Club is formed to serve the needs of a group of challenging boys from the Junior Boys Club.
1906	The Club Library opens one day weekly in the summer.
1910	Ellis Memorial & Eldredge House celebrates its 25th anniversary, and becomes a settlement house at Carver Street, with three resident workers.
1911	The Ellis Memorial-sponsored summer camp moves to Sharon, Massachusetts (later renamed Camp Wadsworth) with sixty campers participating.
1913	A women's residence opens at 34 Church Street and a residence opens in the Carver Street house. A nurse and dietician are added to the staff.
1918	Eliot Wadsworth donates 243 acres of land and buildings to Ellis Memorial. The first settlement house- sponsored camp for the elderly opens.
1920	More than 2,000 campers participate in the Sharon summer camp.
1924	Ellis Memorial purchases 66 Berkeley Street, still home to Ellis Memorial & Eldredge House today.
1926	The Thrift Shop of Boston is established in the basement of 66 Berkeley Street.
1929	Major renovations to 66 Berkeley Street are complet­ed and operations expanded.
1937	Ellis Memorial becomes a member of the Federation of South End Settlements.
1954	Ellis Memorial withdraws from the Federation because of a proposal to sell 66 Berkeley Street as part of a reorganization plan.
1960	The first Annual Ellis Memorial Antiques show is held to help raise funds for Ellis to remain an independent organization. Ellis Memorial establishes a South End Girl Scout troop.
1970	The rooming houses adjacent to 66 Berkeley Street are purchased by Ellis and renovated.
1978	Ellis Memorial establishes the Adult Day Health Program to aid elder and disabled individuals in living independently by providing medical, social support services, and programs.
1987	Ellis Memorial becomes an affiliate of the United Way.
1990	The Tent City Infant/Toddler program is established to provide childcare and early learning programs for the children of Tent City residents.
1992	Ellis Memorial and John Hancock start the Kids-To-Go program for school-age children during school vacations and holidays.
1999	Ellis Memorial opens the Mellon Computer Center, Tent City School Age Program for academic support services, and the Fleet Tutoring Center.
2001	The Infant/Toddler program moves to 95 Berkeley Street and expands to serve 25 families. It is renamed the Mellon Early Learning Center. The Ellis ADHP moves to new and expanded space at 1 Chandler Street.
2003	Ellis Memorial assumes operations of the after school program at Madison Park Village.