- 1 Way Out of Pornography
- 1 Way to Heaven
- 100 Black Men of Indianapolis, Inc.
- 100 Club of Arizona
- 100 Club of Kendall County
- 108 Monkeys
- 1by1 International Inc
- 1ST Way Life Center
- 4 Paws for Ability
- 4-H Clubs & Affiliated 4-H Organizations
- 4-H Clubs & Affiliated 4-H Organizations -Haddam
- 4P Support Group Ohio
- 6:8 Ministries
- A Better Chance Inc - Guilford
- A Better Choice Womens Center
- A Better World - The Adoption Connection
- A Child's Hope Fund
- A Child's Place of Charlotte Inc. - CLT
- A G Gaston Boys and Girls Club
- A Grace Place Adult Care Services - Richmond, VA
- A Grain of Hope Foundation Inc
- A Hand Up, Inc.
- A Hole in the Roof Foundation- Have Faith Haiti Mission
- A Leg to Stand On
- A Place Called Hope Inc
- A Room With A New View
- A Safe Place
- A Shelter Friend, Inc.
- A Special Wish Foundation, Inc.
- A Step Ahead in Pierce County
- A Wish Come True Inc
- A Womans Place
- Aaron Diamond Aids Research Center For The City Of NY
- Aaron Dornan Foundation
- AARP Foundation
- Abandoned Angels Cocker Spaniel Rescue Inc.
- Abandoned Animals
- Abbys Helping Hand
- ABC In Darien, Inc.
- ABC Learning
(123 Mary Street Newington, CT) - Abiding Word Church, Inc.
- Abilities Without Boundaries
- Ability Beyond Disability
- Ability Beyond Disability
- Ability Beyond Disability - CT
- AbilityFirst
- Abilityplus, Inc
- Abington Memorial Hospital
- Abington Police Pal
- Above the Notch Humane Society
- Abundant Life Healing and Deliverance Ministry
- Academy Hill School
- Academy of Our Lady of Good Counsel
- Academy of Our Lady of Mercy
- Academy of the Holy Family
- Acadia Center (formerly Environment Northeast)
- Accelerated Cure Project for MS
- ACCESS Community Action Agency
- Access Emergency Shelter
- Access Fund
- Accion Inc - U.S. Network
- ACES (Area Cooperative Educational Services)
- ACH Child and Family Services
- Achieve Hartford
- Achievement Centers for Children
- Achievements Unlimited Inc
- Achilles Track Club
- ACORD Inc
- Acoustic Neuroma Association
- Action Against Hunger (USA)
- Action for Bridgeport Community Development
- ACTION for Child Protection
- Action To Cure Kidney Cancer
- ActionAIDS - Central Office
- Acts 4 Ministry Inc
- Acts II Ministries Incorporated
- Actuarial Foundation
- Adams Adventure
- Adelante Development Center Inc.
- Adelbrook Behavioral and Developmental Services
- Adelbrook Community Services, Inc. - AKA Children's Home of Cromwell CT
- Adelphic-Cornell Eductional Fund
- Adirondack Central School District
- Adirondack Mountain Club
- AdLib Center for Independent Living
- Adopt A Boxer Rescue
- Adopta Una Familia Inc
- Adopt-A-Dog, Inc.
- Adopt-A-Family
- Adopt-A-Family of the Palm Beaches, Inc.
- Adoption Hope Foundation
- Adoptions from the Heart
- Adoptions From The Heart Inc
- ADRC - Hartford-Practice
- Adult Handicapped Program
- Adult Rehabilitation Center - The Salvation Army Hartford
- Adult Vocational Programs Inc.
- Advent House Ministries Inc
- Adventist Development & Relief Agency International
- Adventure Unlimited