2011
Chapin launches a new website, made possible by generous financial support from the parents of the Class of 2011.
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2008
Completion and dedication of new facilities.
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2006
The school begins renovation and construction at 100 East End Avenue, including the addition of two floors, a new arts center, new science center and new world language lab.
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2005
The school announces its strategic plan to improve four areas: faculty support, financial aid, academic programs and physical facilities.
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2003 
Dr. Patricia T. Hayot becomes Chapin’s sixth Head of School.
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2001
The Chapin School celebrates its Centennial.
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1998 
New facilities, including the Annenberg Center for Learning and Research, are completed and dedicated.
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1993 
Mrs. Berendsen retires after 44 years at Chapin.
Sandra J. Theunick is appointed Head of School.
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1990
Major construction and renovation in main and wing buildings is completed.
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1985
Chapin students participate in the Model United Nations conference at Harvard for the first time.
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1976 
The first edition of Limelight, the student newspaper, is published.
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1973
The Chapin-Brearley Academic Exchange is established, permitting girls in both schools to take courses offered by Chapin or Brearley.
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1972 
Renovation of the Ethel Grey Stringfellow Wing is completed.
The Ethel Grey Stringfellow Library is dedicated.
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1971
The Interschool Program is established to provide expanded opportunities for students in curricular and extracurricular areas.
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1970
Students form the Multi-Media Club and go out to report from the street with a videotape machine.
Miss Stringfellow dies.
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1969 
The school purchases the adjacent building, at 535 East 84th Street, to be known as the Ethel Grey Stringfellow Wing.
The Parents' Association is formed.
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1968
Annual prizes for creative writing, known as the Margaret Emerson Bailey Memorial Awards, are established.
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1963
Jacqueline Bouvier Kennedy ’47 invites Chapin alumnae to visit the White House.
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1959
Miss Stringfellow retires after 50 years at Chapin.
Mildred Jeanmaire Berendsen becomes Headmistress.
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1947
Students form a Current Events Club, including a debating society.
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1942
Most Club Nights are devoted to activities to advance the war effort.
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1937 
One hundred people attend the first alumnae luncheon at the school on April 21, 1937.
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1935
Miss Fairfax dies and Miss Stringfellow becomes Headmistress.
Author Pearl S. Buck comes to Chapin to speak at News about the situation of women in China.
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1934
The name of the school is changed to The Chapin School, Ltd.
Miss Chapin dies.
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1933
Older girls are able to attend concerts, lectures, operas and plays in the afternoons.
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1932 
Miss Chapin retires.
Ethel Grey Stringfellow becomes Joint Headmistress with Miss Fairfax.
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1928 
The school moves to a new building at 100 East End Avenue.
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1925
The school is incorporated as Miss Chapin's School, Ltd. Twenty-three diplomas are awarded.
The enrollment is 319 students.
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1924
The school orchestra makes its first appearance and provides music for a school dancing competition at Club Night.
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1920 
The Dramatic Club forms and presents Shakespeare’s Twelfth Night as its first play.
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1917
The first issue of The Wheel, Chapin's literary magazine, is printed.
Margaret Henderson Bailie ’13 becomes the first Chapin alumna to graduate from college.
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1914
The Alumnae Association is formed by Miss Chapin to do war and welfare work.
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1913
Mary Cecelia Fairfax becomes Associate Headmistress.
The first formal Commencement is held.
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1912 
Students write the school song around this time, with help from music teacher Mrs. Cartwright.
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1911 
The Athletic Association is formed.
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1910 
The school moves to 32 and 34 East 57 Street.
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1908
Charlotte Harding and Sylvia Holt receive the first Chapin diplomas.
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1906
Miss Chapin sets up science laboratories in the basement of the East 58th Street building.
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1905
The school moves to two townhouses at 46 and 48 East 58th Street.
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1904
A carpentry class is started at the school.
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1903
Elocution and penmanship are important parts of the curriculum.
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1902 
Mary Cecelia Fairfax joins Miss Chapin's faculty.
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1901
Maria Bowen Chapin establishes Miss Chapin's School at 12 West 47 Street with seven teachers and 78 students.
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