Elections to Brentwood Council were held on 7 May 1998. One third of the council was up for election and the Liberal Democrat party kept overall control of the council.
After the election, the composition of the council was
| Brentwood Local Election Result 1998 | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Party | Seats | Gains | Losses | Net gain/loss | Seats % | Votes % | Votes | +/- | ||
| Liberal Democrat | 10 | +1 | 71.4 | |||||||
| Conservative | 2 | -1 | 14.3 | |||||||
| Labour | 1 | 0 | 7.1 | |||||||
| Liberal | 1 | 0 | 7.1 | |||||||
| Preceded by Brentwood Council election, 1996 |
Brentwood local elections | Succeeded by Brentwood Council election, 1999 |