Elections to North Lincolnshire Council were held on 1 May 2003. The Labour Party lost its overall majority to the Conservative Party. Overall turnout was 51.3%.
| North Lincolnshire Local Election Result 2003 | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Party | Seats | Gains | Losses | Net gain/loss | Seats % | Votes % | Votes | +/- | ||
| Conservative | 22 | +3 | 51.16% | 45.16% | 61,205 | |||||
| Labour | 21 | -2 | 48.84% | 43.64% | 59,138 | |||||
| Liberal Democrat | 0 | 0 | 0% | 10.63% | 14,411 | |||||
| Socialist Labour | 0 | 0% | 0.37% | 496 | ||||||
| Independent | 0 | 0% | 0.20% | 276 | ||||||
| Preceded by North Lincolnshire Council election, 1999 |
North Lincolnshire local elections | Succeeded by North Lincolnshire Council election, 2007 |