The large group are currently parked on the green field near to the Fleming Park Paddling Pool off Passfield Avenue.
This comes after a group of travellers recently left a green space in the New Forest and another group have pitched up at Southampton Sports centre.
READ MORE: Southampton Sports Centre travellers seen with livestock in field
It is unclear if this group is related to the two other encampments.
The large group in Eastleigh consist of a range of different vehicles including caravans, campervans as well as some horses and ponies.
A spokesperson for Hampshire police said: “This was reported just before 9pm on 25 July. We are working with the local authority to discuss next steps.”
The council has been contacted for more information.
