25 seats needed for a majority
The 1983 Ipswich Borough Council election the system of electing by thirds was completed as this was the third election to the Ipswich Borough Council under the arrangement, whereby a third of the councillors were to stand for election, each time. These new arrangements had been determined by the Local Government Boundary Commission as laid out in their Report 280.
It took place as part of the 1983 United Kingdom local elections. 
There were 16 wards each returning one councillor. The Labour Party retained control of the Council.