Elections to the Northampton Council were held on 6 May 1999. The whole council was up for election with boundary changes since the last election in 1995 increasing the number of seats by 4. The Labour party stayed in overall control of the council.
| Northampton Local Election Result 1999 | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Party | Seats | Gains | Losses | Net gain/loss | Seats % | Votes % | Votes | +/- | ||
| Labour | 28 | -7 | 59.6 | |||||||
| Liberal Democrat | 11 | +5 | 23.4 | |||||||
| Conservative | 8 | +7 | 17.0 | |||||||
| Others | 0 | -1 | 0 | |||||||
| Preceded by Northampton Council election 1995 |
Northampton local elections | Succeeded by Northampton Council election 2003 |