Toa Alta (Spanish pronunciation: [ˈtoa ˈalta]) is a 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 spread over eight wards and Toa Alta Pueblo (the downtown area and the administrative center of the city). It is part of the San Juan-Caguas-Guaynabo Metropolitan Statistical Area.

Toa Alta located west of the capital city of San Juan, the town was founded in 1751 making it one of the oldest towns on the Island. The construction of the San Fernando Rey church in the town square began in 1752. The name Toa Alta comes from the Taino word for valley, "Thoa". Over the years, agriculture became an important economic force in the area. 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 town is also called "Ciudad del Josco". The town is commonly known by its nickname "La Cuna de los Poetas," or "Cradle of Poets," due to the numerous Spanish-language poets who were born there, such as Abelardo Diaz Alfaro and the musician Tomás "Masso" Rivera.

Toa Alta Northern Coastal Plain and to the karst zone.

Like all municipalities in Puerto Rico, Toa Alta is administered by a mayor. The current mayor is Clemente Agosto, from the Popular Democratic Party (PPD). Agosto was elected at the 2012 general election.

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