The 1973 Portsmouth City Council election was held on 10 May 1973 as part of the first elections to the new local authorities established by the Local Government Act 1972 in England and Wales. 48 councillors were elected from 16 electoral divisions. Each division returned three councillors each by first-past-the-post voting for a three-year term of office.
The Conservative Party won overall control of the council.
| Portsmouth City Council election, 1973 | ||||||||
|---|---|---|---|---|---|---|---|---|
| Party | Seats | Seats % | Votes % | Votes | Candidates | |||
| 28 | 58.3% | 49.8% | 76,844 | 48 | ||||
| 17 | 35.4% | 44.7% | 68,974 | 48 | ||||
| 3 | 6.3% | 2.9% | 4,462 | 3 | ||||
| 0 | 0 | 2.6% | 4,071 | 4 | ||||