Big Sister Boston Logo

Big Sister Association of Greater Boston

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Give Now

When you invest in Big Sister Boston, you are directly supporting more than 2,000 mentoring relationships each year.


Become A Big Sister

Being a Big Sister isn't about being perfect, it's about being present. Get started today!


Enroll A Little Sister

Do you know a girl who could benefit from the care, support, and attention of a Big Sister?

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Join the Movement

Volunteering as a Big Sister is an opportunity for you to be present, not perfect. 

Get started today!

Do you know a girl who could benefit from the care, support, and attention of a Big Sister?


Get connected with Sister Source, our online community with resources for teen Big Sisters and current or former Little Sisters ages 14 – 24.

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Ways to Give

We are 100% invested in girls.

We offer a variety of ways to show your investment in girls through charitable giving. 

We ignite girls' passion and power to succeed through positive mentoring relationships with women and enrichment programs that support girls' healthy development.

Ultimately, our vision is to create a mentor-rich community in which every girl has access to the individual nurturing, guidance, and support she needs to become a confident, competent and caring adult. We are a national model for gender-sensitive mentoring for girls which can be replicated in other mentoring programs.

Learn More About Our Mission

big and little sister sitting in a tree during the big sister summer picnic. They are both smiling at the camera.

Making an Impact with

Our Programs

Big Sister Boston is immersed in the diverse communities we serve through a variety of programs. We make and support one-to-one mentoring relationships in the community, in schools, and in workplaces throughout Greater Boston. These relationships are strengthened by the enrichment programs we provide for our Big and Little Sisters which are focused on career awareness, the arts, STEM, safety, wellness, and healthy decision-making. Our programs are designed to support the unique social-emotional needs of girls between the ages of 7-24.

Learn More About Our Programs

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Thriving with

Our Partners

Big Sister Boston is able to offer the depth of programs and activities that we do thanks to our partnerships throughout Greater Boston. From major funders, to academic institutions, to community organizations, we are proud to be supported by a community of partners who are invested in girls.

Meet Our Community

Sister Spotlights

We Need You To Be 100% Invested in Girls

We are community connectors, strengthening the resiliency of the girls of Greater Boston