Elections to Gosport Borough Council were held on 6 May 1999. One third of the council was up for election and the council stayed under no overall control.
After the election, the composition of the council was
| Party | Seats | Gains | Losses | Net gain/loss | Seats % | Votes % | Votes | +/− | |
|---|---|---|---|---|---|---|---|---|---|
| Liberal Democrats | 5 | +4 | 45.5 | ||||||
| Labour | 3 | +1 | 27.3 | ||||||
| Conservative | 3 | +1 | 27.3 | ||||||
| Others | 0 | -6 | 0 | ||||||
