| Country: | Slovenia |
| Type: | parliamentary |
| Previous Election: | 2000 |
| Next Election: | 2008 |
| Seats For Election: | All 90 seats in the National Assembly |
| Majority Seats: | 46 |
| Election Date: | 3 October 2004 |
| Turnout: | 60.64% (9.45 pp) |
| Party1: | Slovenian Democratic Party |
| Leader1: | Janez Janša |
| Last Election1: | 14 |
| Seats1: | 29 |
| Percentage1: | 29.08 |
| Party2: | Liberal Democracy of Slovenia |
| Leader2: | Anton Rop |
| Last Election2: | 34 |
| Seats2: | 23 |
| Percentage2: | 22.80 |
| Party3: | ZLSD |
| Leader3: | Borut Pahor |
| Last Election3: | 11 |
| Seats3: | 10 |
| Percentage3: | 10.17 |
| Party4: | New Slovenia |
| Leader4: | Andrej Bajuk |
| Last Election4: | 8 |
| Seats4: | 9 |
| Percentage4: | 9.09 |
| Party5: | Slovenian People's Party |
| Leader5: | Janez Podobnik |
| Last Election5: | 9 |
| Seats5: | 7 |
| Percentage5: | 6.82 |
| Party6: | Slovenian National Party |
| Leader6: | Zmago Jelinčič |
| Last Election6: | 4 |
| Seats6: | 6 |
| Percentage6: | 6.27 |
| Party7: | Democratic Party of Pensioners of Slovenia |
| Leader7: | Anton Rous |
| Last Election7: | 4 |
| Seats7: | 4 |
| Percentage7: | 4.04 |
| Prime Minister | |
| Before Election: | Anton Rop |
| Before Party: | Liberal Democracy of Slovenia |
| After Election: | Janez Janša |
| After Party: | Slovenian Democratic Party |
Parliamentary elections were held in Slovenia on Sunday, 3 October 2004 to elect the 90 deputies of the National Assembly. A total of 1,390 male and female candidates ran in the election, organized into 155 lists. The lists were compiled both by official political parties and the groups of voters not registered as political parties. Five candidates applied for the seat of the representative of the Hungarian "national community" (as minorities are officially called in Slovenia) and only one candidate applied for the seat of the representative of the Italian national community. In the previous election (2000), fewer than 1000 candidates on 155 lists applied.
In Slovenia, elections in the National Assembly are held in eight voting units, each of which further divides into 11 districts. Different candidates apply in each of the eighty-eight districts. From each of eight units, 11 deputies get elected; however, not necessarily one deputy from each district (from some districts nobody gets elected, from others up to four candidates enter the parliament). Deputy's mandates are distributed at two levels: at the level of the voting unit and at the level of the state. In practice, at the level of voting units two thirds of mandates get allotted, while one third gets allotted at the level of the state. In this manner, 88 mandates get distributed. The remaining two seats are assigned to the representatives of the Italian and Hungarian minorities, which get elected separately (in the ninth and tenth voting units) by the Borda count. Altogether, 90 deputies are elected in the parliament. The election threshold for a party to enter the parliament is four per cent.
[Candidates listed in bold were elected to the National Assembly.]
The candidate for the representative of Italian minority:
The candidates for the representatives of Hungarian minority:
The structure of parties was modified in April 2007, so the following roster is different from 2004.[1] The list can change further, because some deputies can still be promoted to ministers.