圆环病毒科（Circoviridae），又译作圆形病毒科。是单链DNA病毒中的一科，目前较少被研究。

底下有二个属:

• 圆环病毒属(Circovirus)又译作圆形病毒属：代表种猪环病毒（Porcine circovirus ）
• 环转病毒属(Gyrovirus)又译作环回病毒属或环旋病毒属。

Circoviridae is a family of viruses. Birds and mammals serve as natural hosts. There are currently 12 species in this family, divided among 2 genera. Diseases associated with this family include: PCV-2: postweaning multisystemic wasting syndrome; CAV: chicken infectious anemia.