2004 Philippine Senate election

The Koalisyon ng Katapatan at Karanasan sa Kinabukasan (Coalition of Truth and Experience for Tomorrow) or K-4, is the remnant of the People Power Coalition that was formed following the ascendancy of president Gloria Macapagal-Arroyo to power. Arroyo is seeking a complete term under this coalition with Sen. Noli de Castro, an independent, yet popular, politician, as her running mate. The leading party in this coalition is the ruling Lakas-CMD, of which Arroyo is a member. Other parties under this coalition are the Liberal Party, the Nacionalista Party, the Nationalist People's Coalition and the People's Reform Party.

The Koalisyon ng Nagkakaisang Pilipino (Coalition of United Filipinos), or KNP, is the coalition of the united opposition. Its standard bearers are Fernando Poe, Jr. for president and Sen. Loren Legarda for vice-president. The leading parties of this coalition is the Laban ng Demokratikong Pilipino (LDP-Angara Wing), the PDP–Laban and the Pwersa ng Masang Pilipino. The LDP split is caused by stubbornness between FPJ and Ping Lacson especially with the support of the former president Joseph Estrada and former first lady Imelda Marcos. The other major party under this coalition is Estrada's Partido ng Masang Pilipino (PMP, Party of the Filipino Masses).

The third major coalition running in this election is the Alyansa ng Pag-asa (Alliance of Hope), This coalition fielded Raul Roco for president and Herminio Aquino for vice-president. The three major parties supporting this coalition are Roco's Aksyon Demokratiko (Democratic Action), former Defense Sec. Renato de Villa's Reporma Party, and Lito Osmeña's Promdi (Probinsya Muna [Provinces First] Development Initiative/Party). The three parties were the ones that bolted out of the People Power Coalition.

The Bangon Pilipinas (Rise up, Philippines) Movement is the political party of Bro. Eddie Villanueva. It consists mostly of volunteers, a majority of whom came from Villanueva's Jesus Is Lord church (Villanueva resigned from the church before submitting his candidacy, to prevent questions on separation of church and state).

This was composed of Panfilo Lacson's supporters in the LDP Party.

This was Eddie Gil's organization. Gil was deemed a nuisance candidate and was disqualified from the presidential race, however, the party qualified for other positions.

Parties and coalitions		Popular vote			Seats
		Total	%	Swing	Won	End 12th	13th	%	+/−
	Koalisyon ng Nagkakaisang Pilipino (Coalition of United Filipinos) || 90,234,627 || 35.5% || 35.5% || 5 || 3 || 6 || 25.0% || 3
	Lakas (People Power-Christian Muslim Democrats) || 80,684,233 || 31.7% || 12.1% || 4 || 7 || 7 || 29.2% ||
	Liberal (Liberal Party) || 30,008,158 || 11.8% || 3.9% || 2 || 2 || 4 || 16.7% || 2
	PRP (People's Reform Party) || 12,187,401 || 4.8% || 0.8% || 1 || 0 || 1 || 4.8% || 1
	Aksyon (Democratic Action) || 9,362,416 || 3.7% || 5.7% || 0 || 1 || 1 || 4.2% ||
	PMP (Force of the Filipino Masses) || 5,718,740 || 2.2% || 2.2% || * || * || 0 || 0.0% || *
	Reporma-LM (Party for Democratic Reform-Workers' Party) || 4,740,531 || 1.9% || 0.1% || 0 || 0 || 0 || 0.0% ||
	Partido Isang Bansa, Isang Diwa (One Country, One Spirit Party)	862,218	0.3%	0.3%	0	0	0	0.0%
	KBL (New Society Movement) || 540,498 || 0.2% || 0.1% || 0 || 0 || 0 || 0.0% ||
	LDP (Struggle of Democratic Filipinos) || 0 || 0.0% || 21.3% || 0 || 4 || 1 || 4.2% || 3
	PDP–Laban (Philippine Democratic Party-People Power) || 0 || 0.0% || 4.8% || * || 1 || 1 || 4.2% ||
	Independent || 19,877,921 || 7.8% || 15.5% || 0 || 5 || 2 || 4.8% || 3
Totals		254,216,743	100.0%	--	12	24	23	95.8%

*All PDP–Laban and PMP incumbents whose seats are up ran under the KNP banner.

• Philippine Presidency Project
• Philippine Commission on Elections
• National Movement for Free Elections (NAMFREL)

• Eleksyon 2004 (Media website)
• 4 exit polls have 3 different winners - Philippine Daily Inquirer
• Proberz exit polls: FPJ winner
• Congress approves canvassing rules - Philippine Daily Inquirer
• SWS admits it made errors in exit poll - Philippine Daily Inquirer

• On Election Polls: Part IV WHO DID BETTER - SWS OR PULSE ASIA? - Dr. Romula A. Virola
• Dec. 30, 2002 Arroyo speech declaring her intention not to run
• P.E.T. Case No. 003, Legarda vs. De Castro