Big Brothers Big Sisters of Greater Los Angeles (BBBSLA) makes meaningful, monitored matches between adult volunteers, called Bigs, and children, called Littles, ages 6 to 18, across Los Angeles County. Tiffany Siart serves as CEO, and the agency reports annual revenue of roughly $29.8 million, putting it among the larger BBBS affiliates in the country. Beyond traditional community-based mentoring, BBBSLA runs school-based mentoring in elementary grades and a workplace mentoring program for high school students. Website bbbsla.org; phone 213-213-2400.
BBBSLA matches a child (a Little) with a volunteer adult mentor (a Big) in a one-to-one relationship that gives the child a consistent, supportive adult presence. Mentors meet with their Littles for activities and conversation, building the kind of stable relationship that research links to higher confidence, better school engagement, and resilience.
Across one of the largest and most spread-out counties in the country, BBBSLA delivers mentoring through three models. Community-based matches pair a Big and Little who meet on their own schedule. School-based mentoring brings volunteers into elementary schools to support students in grades 2 through 5. The workplace mentoring program connects high school students from under-resourced schools with professional mentors and a development-focused curriculum.
With annual revenue of roughly $29.8 million, BBBSLA operates at a scale that few BBBS affiliates reach. That budget reflects both the size of Los Angeles County, home to roughly 10 million people, and the corporate, foundation, and individual support the agency has built over decades.
Serving a county that stretches from the Antelope Valley in the north to the San Gabriel Valley in the east from only a handful of locations means the agency relies heavily on its school-based and workplace models to reach students where they already are.
The community-based program is the classic BBBS model: a vetted adult volunteer and a child matched on shared interests, meeting regularly. The school-based program places mentors inside elementary schools, which lowers the barrier for both families and volunteers in a region where commuting distances are long.
The workplace mentoring program is aimed at high school students from under-resourced communities, pairing them with professionals and a curriculum focused on personal, academic, and professional development. Together the three models let BBBSLA serve children at different ages and life stages.
BBBSLA serves children across Los Angeles County, the most populous county in the United States. The county's size and diversity mean the agency works with families in very different circumstances, from dense urban neighborhoods to outlying communities in the Antelope Valley.
Demand for mentoring consistently outpaces the number of available volunteers, so the agency continually recruits Bigs, especially adults who can commit to a long-term, consistent relationship with a Little.
To become a Big, visit bbbsla.org or call 213-213-2400. Volunteers go through an application, screening, and matching process designed to create a safe, well-supported match. BBBSLA staff provide ongoing support to each match to help the relationship succeed.
Adults can choose the model that fits their schedule, from community-based mentoring to school-based or workplace programs that meet during structured times.
Donations can be made at bbbsla.org. BBBSLA is a 501(c)(3) organization, so gifts are tax-deductible. Corporate partnerships, foundation grants, and individual giving fund the agency's work, and the workplace mentoring program in particular connects corporate partners directly to students.
Because each match requires professional staff support to stay safe and effective, unrestricted gifts that fund match support are especially valuable.
Los Angeles has a deep field of youth-serving organizations, including Boys and Girls Clubs and after-school networks that reach large numbers of children through group programming. For one-to-one, professionally supported mentoring specifically, BBBSLA is the largest dedicated agency in the region, with revenue of roughly $29.8 million and three distinct mentoring models.
For families seeking a sustained individual relationship for a child, BBBSLA's model is distinct from group-based programs; the two often complement each other.
Last updated June 2026. BBBSLA CEO (Tiffany Siart), revenue (~$29.8 million), Los Angeles County service area, ages 6 to 18, and community-based, school-based, and workplace mentoring programs from BBBSLA (bbbsla.org), ProPublica Nonprofit Explorer, and Cause IQ (EIN 95-1904857). Phone 213-213-2400 from BBBSLA. We are not affiliated with Big Brothers Big Sisters of Greater Los Angeles and receive no compensation for this listing. Spotted an error? [email protected]
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