Big Sisters and Little Sisters dancing together at Big Sister Association of Greater Boston's annual summer picnic on Boston's Long Island

Our Mission Statement

Big Sister Association of Greater Boston's mission is to help girls realize their full potential through positive mentoring relationships with women.

Big Sister and her Little Sister sitting on the steps, enjoying some ice cream on a hot summer day as part of our one-to-one mentoring programs

Become a Big Sister today.

It isn't about being perfect. It's about being present. Find out how to become a Big Sister today.

Volunteers waiting at the starting line to ride bikes for miles throughout Southeastern Massachusetts to benefit girls mentoring programs

Get Involved.

You don't have to be a mentor to make a difference. Join thousands of men and women supporting Greater Boston's girls through volunteerism and philanthropic contributions.

Woman with coffee and jump rope helping girls jump and play together

Enroll a girl today.

If you want your daughter to have a Big Sister, enroll today with our simple online application.

Governor-elect Charlie Baker posing with Big Sisters and Little Sisters at Big Sister's annual Big In Boston dinner at the Museum of Fine Arts

Recent Event: Big in Boston

Date: November 8, 2014

Location: Museum of Fine Arts, Boston

Honoring: Jack Connors, Jr.

Big in Boston
Five hundred guests came together at the MFA Boston to benefit Big Sister's mentoring programs for girls.

News Events

  • News
  • 12/09/2014
  • CEO Deborah Re Reaches Pinnacle
  • The Greater Boston Chamber of Commerce honors CEO Deborah Re with the Pinnacle Award for Achievement in Management in the nonprofit sector.
  • Blog
  • 11/06/2014
  • It's the Little Things
  • Current and former Big Sisters share their stories through The BIG Picture blog series.


Become a Big Sister today!

Big in Boston celebrates our mentoring programs for girls and those who have made their mark on Boston. Help us get more #Girls2Great by becoming a Big Sister. Thank you, FleishmanHillard!


A map of the MBTA that is used to illustrate Big Sister Association's role in the creation and support of girls mentoring programs.

Big Sister raises 85% of our annual revenue through private philanthropy; your donation is critical.

Deborah Re CEO Big Sister provides commentary and insight into global and local news impacting girls and women.


The data disclosed in the article “Black, Latino males lag in Boston schools,” is unsettling yet it gives us important information about the role race and ethnicity plays in creating a tracked system. Since the data was disaggregated by gender, then we need to analyze the information about Black and Latina girls as well to ensure all our children are being given the opportunities and access to education that they deserve. The future leadership of our city depends on it.