Sindbis virus is widely and continuously found in insects (the main vectors are Culex and Culiseta mosquitoes) and vertebrates in Eurasia, Africa, and Oceania.
Sindbis-viirust esineb laialdaselt ja püsivalt putukatel (peamised vektorid on perekonna Culex ja Culiseta sääsed) ning Euraasia, Aafrika ja Okeaania selgroogsetel.