A number of motorbikes, a caravan and a wheelie bin were targeted by arsonists overnight.
A wheelie bin went up in flames in Cookson Close, Southey Green, at 7.10pm.
Firefighters from Rivelin Fire Station spent 20 minutes tackling the blaze.
Three motorbikes were set alight in Fishponds Road, Woodthorpe, at 7.30pm.
Parkway firefighters spent 15 minutes tackling the fire.
Yobs set fire to a pile of litter in Broadway, Dunscroft, at 8pm.
A crew from Thorne Fire Station were at the scene for almost an hour.
A disused caravan went up in flames in Carr Side Lane, Hatfield, just before midnight.
Two crews from Doncaster Central Fire Station spent an hour tackling he blaze.