Gerasa Gerasa was a town in Decapolis, south-east of the Sea of Galilee. It lay within the region of Gadara and gave its name to the surrounding district. As a result some of the Gadarenes were at times called Gerasenes, even though they may not have lived in the town itself (Mark 1:5-2; cf. Matthew 8:28). (For map and other details See Decapolis; GadARA.)