Coastside Habitat Coalition
- Non-profit organization to protect endangered species and their habitat. Background, articles, contact information and store.
- http://www.isart.com/chc_intro_page.htm

Community Gatepath
- A non-profit organization dedicated to enabling persons with disabilities to live as fully integrated members of the community. Includes gallery of original artwork for sale, made by participants in Adult Care Service programs.
- http://www.communitygatepath.com/

Human Investment Project For Housing
- Creative, affordable solutions to a variety of housing needs in San Mateo County.
- http://www.hiphousing.org/

El Centro de Libertad--The Freedom Center
- Outpatient drug and alcohol recovery program serving San Mateo County with offices in Redwood City and Half Moon Bay. Bilingual English and Spanish. Serves adults, youth and families. Treatment and prevention. Offers family counseling, anger management
- http://www.elcentrodelibertad.org

Project 90
- A non-institutional residential alcohol and drug recovery program in San Mateo, California. 501 (c)(3) non-profit corporation
- http://www.projectninety.org/

Edgewood Weed Warriors
- Group involved in the Habitat Restoration program at Edgewood Country Park and Natural Preserve.
- http://edgewood.thinkersrus.net/

St. Vincent de Paul Society of San Mateo
- A non-profit Catholic lay organization made up of men, women and youth who provide a variety of services to those in need throughout San Mateo County. Web site lists local resources and contact information for homeless services and others who may need he
- http://vincent.org/index.htm?sanmateo.htm

Coastside Opportunity Center
- 501(c)(3) non-profit organization in El Grenada serving coastal residents of San Mateo County offering social services, case management, transportation.
- http://www.coastside.org/

Senior Coastsiders
- Non-profit 501(c)(3) organization serving disabled and senior coastal residents in San Mateo County, California. Services include transportation, case management, hot food, home repair. Operates Next-to-New thrift store.
- http://www.seniorcoastsiders.org

North Peninsula Neighborhood Services Center, Inc.
- Non-profit 501(c)(3) organization offering social services in South San Francisco, San Bruno and Brisbane and free and low-cost home repair, community education and outreach throughout San Mateo County, California.
- http://www.neighborhoodservices.org

Samaritan House
- Nonprofit 501(c)(3) organization providing a broad range of services dedicated to meeting the needs of low-income residents within central San Mateo County. Food, clothing, furniture, shelter, education and health care are all provided free of charge.
- http://www.samaritanhouse.com

Shelter Network
- A nonprofit organization which provides housing and services for homeless families and individuals. San Mateo County's first and only 24-hour, year-round emergency shelters. First Step for Families in San Mateo serves homeless families. Maple Street She
- http://www.shelternetwork.org