Municipal elections were held in Finland on 24 October 2004, with advance voting between 13 and 19 October. 11,966 municipal council seats were open for election in 416 municipalities.
| Party | Votes | % | Seats | +/– | |
|---|---|---|---|---|---|
| Social Democratic Party | 575,822 | 24.11 | 2,585 | +26 | |
| Centre Party | 543,885 | 22.77 | 4,425 | –200 | |
| National Coalition Party | 521,412 | 21.83 | 2,078 | +50 | |
| Left Alliance | 228,358 | 9.56 | 987 | –40 | |
| Green League | 175,933 | 7.37 | 314 | –24 | |
| Swedish People's Party | 124,011 | 5.19 | 636 | –8 | |
| Christian Democrats | 94,666 | 3.96 | 391 | –52 | |
| Finns Party | 21,417 | 0.90 | 106 | –3 | |
| Communist Party | 12,844 | 0.54 | 16 | +2 | |
| Finnish People's Blue-Whites | 3,173 | 0.13 | 2 | 0 | |
| Alternative League | 2,257 | 0.09 | 1 | +1 | |
| Communist Workers' Party – For Peace and Socialism | 1,248 | 0.05 | 1 | –1 | |
| Seniors' Party | 1,242 | 0.05 | 1 | 0 | |
| Independence Party Union of Free Finland | 1,228 | 0.05 | 2 | –1 | |
| Liberals | 1,016 | 0.04 | 1 | 0 | |
| For the Poor | 799 | 0.03 | 0 | 0 | |
| Fatherland | 337 | 0.01 | 0 | 0 | |
| Others | 78,482 | 3.29 | 420 | –60 | |
| Total | 2,388,130 | 100.00 | 11,966 | –312 | |
| Source: Tilastokeskus[1] | |||||
