| Acronym | Definition |
|---|
| CHA | Centrally Heated Air (classified ad listings) |
| CHA | Charisma |
| CHA | Chicago Housing Authority |
| CHA | Caribbean Hotel Association |
| CHA | Chunta Aragonesista (Aragonesist Union - Nationalist Party of Aragon) |
| CHA | Canadian Historical Association |
| CHA | College Hockey America |
| CHA | Craft and Hobby Association (Elmwood Park, New Jersey) |
| CHA | Consortium of Humanitarian Agencies |
| CHA | Canadian Hockey Association |
| CHA | Canadian Healthcare Association |
| CHA | Certified Hotel Administrator (AH&LA Educational Institute) |
| CHA | Class Hierarchy Analysis |
| CHA | Catholic Health Association of the United States |
| CHA | California Hospital Association (Sacramento, CA) |
| CHA | Certified Horsemanship Association |
| CHA | California Healthcare Association |
| CHA | Clough, Harbour & Associates LLP |
| CHA | Community Health Aide |
| CHA | Capital Health Authority (Canada) |
| CHA | Coordination of Humanitarian Assistance |
| CHA | Catholic Health Australia |
| CHA | Center for Healthy Aging (California) |
| CHA | California Health Advocates |
| CHA | Chattanooga Housing Authority (TN, USA) |
| CHA | Continental Hockey Association |
| CHA | Council on Hemispheric Affairs |
| CHA | Children's Healthcare of Atlanta |
| CHA | Coalition for Hemp Awareness |
| CHA | Colorado Health & Hospital Association |
| CHA | Chattanooga, TN, USA - Cha Lovell Field (Airport Code) |
| CHA | Chapter Alpha (unreal fan fiction community) |
| CHA | Children's Hunger Alliance |
| CHA | Cardiovascular Hospitals of America (Wichita, KS) |
| CHA | Child Health Advocates (Colorado) |
| CHA | Concept Hazard Analysis |
| CHA | Compact Hollow-shaft Actuator |
| CHA | Civil Hospital Ahmedabad |
| CHA | Conical-Horn Antenna |
| CHA | Cotswold Heritage Academy (UK) |
| CHA | Ship Characteristics (TMINS) |
| CHA | Corporate Hospitality Association |
| CHA | Connecticut Hospital and Affiliates |
| CHA | Cowboy Heritage Association (Fort Worth, Texas) |
| CHA | Country Haven Academy |
| CHA | Call Handling Agent |
| CHA | Chicago American League (baseball) |
| CHA | Chamber of Hispanic Affairs |
| CHA | Chicago Helicopter Airways, Inc. |
| CHA | Christian Homeschoolers Association |
| CHA | Corporate Holdings of America |
| CHA | Chickasaw Horse Association |
| CHA | Chaudhuri, Hu, and Afshar Algorithm (also seen as C-H-A) |
| CHA | Citywide Habitat Assessment (Seattle, WA) |
| CHA | Certified Hospice Administrator |