| Acronym | Definition |
|---|
| RNCA | Riparian National Conservation Area |
| RNCA | Registrant Name Change Agreement (used for domain name transfers) |
| RNCA | Royal Newfoundland Constabulary Association |
| RNCA | Royal Naval Communications Association |
| RNCA | Registrant Name Change Application |
| RNCA | Romanian National Customs Authority |
| RNCA | Regional Nuclear Cooperation in Asia |
| RNCA | Riverside Nature Center Association |
| RNCA | Russian National Cultural Autonomy |
| RNCA | Richmond Neighborhood Community Association (Buffalo, NY) |
| RNCA | Redes No Cartesianas Adaptadas |
| RNCA | Resident Neighborhood Community Association (Cincinnati, OH) |
| RNCA | Radio Network Control Assemblies |
| RNCA | Renal Calculus |
| RNCA | Romanian National Cynologic Association |
| RNCA | Ridgeview Neighborhood Civic Association (Sandy Springs, GA) |