2007 Madrid City Council election
The 2007 Madrid City Council election, also the 2007 Madrid municipal election, was held on Sunday, 27 May 2007, to elect the 8th City Council of the municipality of Madrid. All 57 seats in the City Council were up for election. The election was held simultaneously with regional elections in thirteen autonomous communities and local elections all throughout Spain.
Alberto Ruiz-Gallardón's People's Party went on to win the largest victory achieved by a candidate in a municipal election in Madrid to date, with over 55% of the votes and nearly 60% of the seats. The Spanish Socialist Workers' Party plummeted barely above 1995 levels, while United Left recovered from its negative result in 2003 and gained support for the first time since 1995.
Electoral system
The City Council of Madrid was the top-tier administrative and governing body of the municipality of Madrid, composed of the mayor, the government council and the elected plenary assembly. Elections to the local councils in Spain were fixed for the fourth Sunday of May every four years.Voting for the local assembly was on the basis of universal suffrage, which comprised all nationals over eighteen, registered in the municipality of Madrid and in full enjoyment of their political rights, as well as resident non-national European citizens and those whose country of origin allowed Spanish nationals to vote in their own elections by virtue of a treaty. Local councillors were elected using the D'Hondt method and a closed list proportional representation, with a threshold of five percent of valid votes—which included blank ballots—being applied in each local council. Parties not reaching the threshold were not taken into consideration for seat distribution. Councillors were allocated to municipal councils based on the following scale:
| Population | Councillors |
| <250 | 5 |
| 251–1,000 | 7 |
| 1,001–2,000 | 9 |
| 2,001–5,000 | 11 |
| 5,001–10,000 | 13 |
| 10,001–20,000 | 17 |
| 20,001–50,000 | 21 |
| 50,001–100,000 | 25 |
| >100,001 | +1 per each 100,000 inhabitants or fraction +1 if total is an even number |
The mayor was indirectly elected by the plenary assembly. A legal clause required that mayoral candidates earned the vote of an absolute majority of councillors, or else the candidate of the most-voted party in the assembly was to be automatically appointed to the post. In the event of a tie, a toss-up would determine the appointee.
The electoral law allowed for parties and federations registered in the interior ministry, coalitions and groupings of electors to present lists of candidates. Parties and federations intending to form a coalition ahead of an election were required to inform the relevant Electoral Commission within ten days of the election call, whereas groupings of electors needed to secure the signature of a determined amount of the electors registered in the municipality for which they were seeking election, disallowing electors from signing for more than one list of candidates. For the case of Madrid, as its population was over 1,000,001, at least 8,000 signatures were required.