Toa Alta (Spanish pronunciation: [ˈtoa ˈalta]) is a town and municipality of Puerto Rico located in the northern coast of the island, north of Naranjito; south of Dorado and Toa Baja; east of Vega Alta and Corozal; and west of Bayamón.

Toa Alta is located west of the capital city of San Juan and was founded in 1751, making it one of the oldest towns on the main island of Puerto Rico.

At the peak of the agricultural economy, the town was also known as the "Granja de los Reyes Católicos" (the Farm of the Catholic Monarchs).

The municipal buildings, central square and large Catholic church are located in a barrio referred to as "el pueblo".

The Fiestas Patronales de San Fernando is a religious and cultural celebration that generally features parades, games, artisans, amusement rides, regional food, and live entertainment.

The current mayor of Toa Alta is Clemente Agosto, of the Popular Democratic Party (PPD).

[29] In January, 2019 the mayor of Toa Alta fought for the reopening of highway #861, which, he stated, was closed without warning by Puerto Rico Public Works.

The motto is Non Deserit Alta and Professor Herman E. Pérez included it in the coat of arms so that present and future generations will remember to “not abandon higher principles and values”.