The Borough Council of Wellingborough in Northamptonshire, UK was elected every four years. After the last boundary changes in 1999, thirty-six councillors were elected from 16 wards. The council was abolished in 2021, with the area becoming part of North Northamptonshire.
The first election was held in 1973. The council then acted as a shadow authority alongside the outgoing authorities until 1 April 1974 when it formally came into being. From 1974 until its abolition in 2021, political control of the council was as follows:
The leaders of the council from 1991 until the council's abolition in 2021 were: