The Stockholm municipal election of 1998 was held on 15 September 1998, concurrently with the 1998 Swedish general election. Using a party-list proportional representation system to allocate the 101 seats of the Stockholm city council (Stockholms kommunfullmäktige) amongst the various Swedish political parties. Voter turnout was 76.9%.
The results for the Social Democrats were the lowest in decades, and for the first time since the initiation of universal male suffrage in 1911, the Moderates outnumbered the Social Democrats to become the largest party on the Stockholm City Council as a result of this election.
| Party | Votes | Seats | ||||
| # | % | + – | # | + – | ||
| Moderate Party Moderaterna (m) |
146,797 | 32.9% | +4.3% | 35 | +6 | |
| Social Democrats Socialdemokraterna (s) |
114,118 | 25.6% | –7.4% | 29 | –8 | |
| Left Party Vänsterpartiet (v) |
54,663 | 12.3% | +3.1% | 13 | +2 | |
| Liberal People's Party Folkpartiet liberalerna (fp) |
34,789 | 7.8% | –0.1% | 9 | ±0 | |
| Christian Democrats Kristdemokratiska samlingspartiet (kd) |
28,320 | 6.4% | +4.3% | 6 | +6 | |
| Green Party Miljöpartiet (mp) |
26,347 | 5.9% | –1.9% | 6 | –2 | |
| Stockholm Party Stockholmspartiet (sp) |
19,561 | 4.4% | NA[1] | 3 | +1 | |
| Centre Party Centerpartiet (c) |
9,187 | 2.1% | –3.3% | 0 | –5 | |
| Other parties | 11,942 | 2.7% | NA[1] | 0 | ±0 | |
| Total | 445,724 | 100% | — | 101 | ±0 | |
| Invalid ballots | 8,469 | |||||