Guiguinto, officially the Municipality of Guiguinto (Tagalog: Bayan ng Guiguinto), is a municipality in the province of Bulacan, Philippines. According to the 2020 census, it has a population of 113,415 people.

It is the birthplace of composer Constancio De Guzman, known for writing songs like "Maalaala Mo Kaya". It also houses the Immaculate Conception Seminary, a Diocesan Seminary of the Diocese of Malolos located in barangay Tabe. The appellation “Guiguinto” literally translates to “Gold” (ginto for Tagalog, gintu for Kapampangan) for the early conquistadores came and saw this town on a harvest season when it lushes in golden rice stalks against the sun.

Guiguinto began as a barrio of Bulakan, the former provincial capital of Bulacan. It is said that Spaniards set up an army post in the barrio to serve as a resting place for forces going to Northern Luzon. In those days, travel throughout Guiguinto was difficult and slow down to cross single file over a narrow bamboo bridge. Their Filipino guides would cry out, "Hinto" (Tagalog for stop). The Spaniards thought this was the name "Hihinto". The Spaniards substituted "Gui" (with hard "g") for the Tagalog "Hi". The place has since been called Guiguinto. On the other hand, old timers say that on moonlight nights, a golden bull emerges from the church and goes down to the nearby river to quench his thirst. It then returns to the church, ascends at the altar and disappears. The elders' aid that there are buried jars of gold in town, as indicated by the bull, and that is why the town was called Guiguinto. It became an encomienda in the 1591 but the ecclesiastical administration was under Bulakan Convent and it was established as a town in 1641.

In 1800, an Augustinian friar erected a small chapel in what is now barrio Santa Rita. In 1873, roads were constructed in barrio Malis. The people barrios of Pritil, Tabe, and Cutcut even those days were mostly farmers. During Holy Week, villagers of barrio Tuktukan held contest for the hardest egg shells (chicken, duck or goose by knocking eggs together (Tuktukan)). The women tried to help each other in singing the "Panica".

Just before the outbreak of the revolution of 1896, the town people of Guiguinto were ordered to sleep in the town at night and to work in their fields only in the day. This was said to have been suggested by the town priest to the authorities because of rumors that many of the town people were joining the secret revolutionary society, the Katipunan. Guiguinto eventually contributed many soldiers to the 1896 revolution.

At the time of American occupation, the new colonizers reorganized the Province of Bulacan into 19 municipalities from the original 26. Under populated town were subordinated with the large one and the town of Guiguinto was integrated in the town of Bulakan for almost 11 years. In 1915, Guiguinto regain its township again with Antonio Figueroa as its municipal mayor of the modern period. The town's population was then about 4,000. The 1960 census placed Guiguinto's population at 10,629. Guiguinto is bounded on the east by the town of Balagtas, on the west by Malolos City, on the north by Plaridel, and on the south by Bulacan.

Guiguinto is 34 kilometers (21 mi) from Manila and 11 kilometers (6.8 mi) from Malolos City.

With the continuous expansion of Metro Manila, Guiguinto is part of Manila's built-up area which reaches San Ildefonso, Bulacan at its northernmost part.

Guiguinto is politically subdivided into 14 barangays. Each barangay consists of puroks and some have sitios.

PSGC	Barangay	Population			±% p.a.
		2020		2010
031408001	Cutcut	2.6%	2,940	2,701	▴	0.85%
031408002	Daungan	1.6%	1,800	1,384	▴	2.66%
031408003	Ilang‑Ilang	5.0%	5,628	4,436	▴	2.41%
031408004	Malis	14.3%	16,223	13,957	▴	1.52%
031408005	Panginay	1.3%	1,528	1,159	▴	2.80%
031408006	Poblacion	3.6%	4,099	3,852	▴	0.62%
031408007	Pritil	4.6%	5,172	4,165	▴	2.19%
031408008	Pulong Gubat	1.7%	1,879	3,186	▾	−5.14%
031408009	Santa Cruz	10.8%	12,216	11,639	▴	0.48%
031408010	Santa Rita	12.1%	13,687	13,163	▴	0.39%
031408011	Tabang	7.8%	8,832	7,332	▴	1.88%
031408012	Tabe	7.3%	8,310	7,204	▴	1.44%
031408013	Tiaong	6.7%	7,640	7,279	▴	0.49%
031408015	Tuktukan	8.6%	9,776	9,050	▴	0.77%
	Total		113,415	90,507	▴	2.28%

Population census of Guiguinto

Year	Pop.	±% p.a.
1903	3,948	—
1918	4,847	+1.38%
1939	6,199	+1.18%
1948	7,979	+2.84%
1960	10,629	+2.42%
1970	16,075	+4.22%
1975	20,590	+5.09%
1980	27,751	+6.15%
1990	44,532	+4.84%
1995	52,575	+3.16%
2000	67,571	+5.53%
2007	89,225	+3.91%
2010	90,507	+0.52%
2015	99,730	+1.87%
2020	113,415	+2.56%
Source: Philippine Statistics Authority

In the 2020 census, the population of Guiguinto, was 113,415 people, with a density of 4,100 inhabitants per square kilometer or 11,000 inhabitants per square mile.

Poverty incidence of Guiguinto

2.5 5 7.5 10 12.5 15 2006 5.00 2009 4.12 2012 4.28 2015 5.66 2018 5.48 2021 11.38 Source: Philippine Statistics Authority

A quarter of its 2,512 hectares (6,210 acres) was converted into nurseries giving livelihood to 500 families of gardeners and landscapers. Mayor Isagani Pascual announced that the landscaping business in Guiguinto is now a ₱50 million industry. Jojo Sebastian, chair of the Guiguinto Garden City Cooperative stated that their garden stores sell ₱100,000 to ₱300,000 plants and contracts for garden and landscapes designs a month.

San Miguel Corporation is developing a new community called AcroCity (formerly T12 Polo Land Industrial Estates) in Barangay Tabang. It is a 15-hectare (37-acre) industrial and commercial complex with 56 warehouses and is envisioned as a lifestyle hub.

In 2024, Development Bank of the Philippines under its DBP SHIELD program, granted a PHP1.6-billion loan for the construction of 10-story Luzon Alliance Medical Center, Inc. (LAMCI). Guiguinto's biggest private hospital was founded by President Dr. Oscar Evangelista, Chairman Dr. Roberto De Leon, and Dra. Maria Socorro Caldevida with Ospital ng Guiguinto administrator, Dr. Paul Ruel C. Camiña, medical director.

• San Ildefonso Parish Church
• Santa Rita Parish Church
• Guiguinto Gardens in Santa Cruz and Tabang
• Garden City in Santa Cruz
• Guiguinto Municipal Garden in Poblacion
• C.M. Farm in Cut-Cut
• Golden Shower in Tabe
• Alcor Center in Tiaong
• Hidden Mountain Rocks in Tiaong
• Luntiang Paraiso in Tabang
• Guiguinto station
• Camp Hotel and Resort in Pritil
• Klir Waterpark Resort in Santa Rita
• St. Agatha Hotel and Resort in Santa Rita

Established in 1999 by Mayor Ambrosio Cruz, Jr., the Halamanan Festival has since become the brand of the Municipality of Guiguinto. It was conducted in gratitude and recognition Guiguinto's dear patron, St. Ildephonsus (San Ildefonso), who held every January 23. It is considered that grand Street Dancing Festival, the participation of dancers from the schools and villages of Guiguinto and be in different towns of Bulacan. They adorned the garments as flowers and more. Besides the celebration for the feast of San Ildefonso was also a means to further pitting and display capabilities and "galing" of Guiguinteño in various fields of horticulture as landscaping, propagation seedling, plant growing, flower cutting, arranging and interior decorating.

• 
  February 20, 1944 Bantayog ng mga Bayani
• 
  Bulacan Welcome Arch (Santa Cruz)
• 
  The Tabang Toll Barrier (NLEX)
• 
  Acro Residences
• 
  TESDA Regional Training Center Central Luzon
• 
  New Guiguinto station in Barangay Tabang

• Guiguinto Bulacan
• Philippine Standard Geographic Code
• Philippine Census Information