Significance COVID-19, caused by SARS-CoV-2, is a major global health threat. The host range of SARS-CoV-2 and intermediate hosts that facilitate its transmission to humans remain unknown. We found that SARS-CoV-2 has the potential to infect a broad range of mammalian hosts, including domestic animals, pets, livestock, and animals commonly found in zoos and aquaria. Those species may be at risk for human-to-animal or animal-to-animal transmissions of SARS-CoV-2. Our study highlights the importance of banning illegal wildlife trade and consumption, and enforcing the importance of surveilling animals in close contact with humans as potential zoonotic reservoirs to prevent outbreaks in the future.