| Election Name: | 1999 Sheffield City Council election |
| Country: | England |
| Type: | Parliamentary |
| Ongoing: | no |
| Party Colour: | yes |
| Previous Election: | 1998 Sheffield City Council election |
| Previous Year: | 1998 |
| Next Election: | 2000 Sheffield City Council election |
| Next Year: | 2000 |
| Seats For Election: | 29 of 87 seats to Sheffield City Council |
| Majority Seats: | 44 |
| Election Date: | 6 May 1999 |
| Party1: | Liberal Democrats (UK) |
| Seats1: | 18 |
| Seat Change1: | 10 |
| Party2: | Labour Party (UK) |
| Seats2: | 11 |
| Seat Change2: | 10 |
| Party3: | Conservative Party (UK) |
| Seats3: | 0 |
| Seat Change3: | 0 |
| Map Size: | 400px |
| Majority party | |
| Posttitle: | Majority party after election |
| Before Election: | Labour Party (UK) |
| After Election: | Liberal Democrats |
Elections to Sheffield City Council were held on 6 May 1999 with one third of the council was up for election. Previous to this election, there had been a by-election in Park, resulting in a Liberal Democrat gain from Labour, effectively cancelling out the concurrent defection of sitting Stocksbridge councillor Alan Pears from the Lib Dems to Labour. The election saw the Liberal Democrats gain control of the council - the first time since its formation for it not to be controlled by Labour. The results themselves were more favourable to Labour than recent elections. However, they suffered double-digit losses, with the Liberal Democrats sustaining their recent election surges.
|- style="background-color:#F9F9F9"! style="background-color: " || Independent Green| align="right" | 0| align="right" | 0| align="right" | 0| align="right" | 0| align="right" | 0.0| align="right" | 0.0| align="right" | 41| align="right" | New|-
This result had the following consequences for the total number of seats on the council after the elections:
| valign=top colspan="2" style="width: 230px" | Party | valign=top style="width: 30px" | Previous council | valign=top style="width: 30px" | New council |
|---|---|---|---|---|---|
| Liberal Democrats | 36 | 47 | |||
| Labour | 50 | 39 | |||
| Conservatives | 1 | 1 | |||
| Total | 87 | 87 | |||
| Working majority | |||||
Andy Hinman was a sitting councillor for Nether Edge ward
Peter Fox was a sitting councillor for Dore ward
|- style="background-color:#F9F9F9"! style="background-color: " || Independent Green| Michael Jennings| align="right" | 41| align="right" | 1.5| align="right" | +1.5|-
Alan Pears was previously elected as a Liberal Democrat councillor