Planet Earth
Easter Island
Ebony
Echo City Zone
King Edward
Eelton John
Egg-O-Matic
Eggrobo
Ekkletos
Elder Tree
Eldorado Zone
The Emerald Hill Folk
Emerald Hill Zone
Emerald Valley Village
Sonic's Emerald Valley Headquarters
Emperor Metallix
The Enchanter Kings
Robotnik's Energy Absorbing/Transmitting Device
Robotnik's Engine Of Destruction
Equinox Laboratory
Errol Blackthrone
Espio The Chameleon
Evil Sonic