Cantons of Costa Rica in the context of Districts of Costa Rica

San José (Spanish: [saŋ xoˈse]; meaning "Saint Joseph") is the capital and largest city of Costa Rica, and the capital of San José Province. It is in the center of the country, in the mid-west of the Central Valley, within San José canton. San José is Costa Rica's seat of national government, focal point of political and economic activity, and major transportation hub. San José is simultaneously one of Costa Rica's cantons, with its municipal land area covering 44.62 square kilometers (17.23 square miles) and having within it an estimated population of 352,381 people in 2022. Together with several other cantons of the central valley, including Alajuela, Heredia and Cartago, it forms the country's Greater Metropolitan Area, with an estimated population of over 2 million in 2017. The city is named in honor of Joseph of Nazareth.

Founded in 1736 by order of Cabildo de León, the population of San José rose during the 18th century through the use of colonial planning. It has historically been a city of strategic importance, having been the capital of Costa Rica three times. More than a million people pass through it daily. It is home to the Museo Nacional de Costa Rica, the National Theatre of Costa Rica, and La Sabana Metropolitan Park. Juan Santamaría International Airport serves the city.

Puntarenas is a canton in the Puntarenas province of Costa Rica. The head city is Puntarenas.

Monteverde is the twelfth canton of the Puntarenas province of Costa Rica, located in the Cordillera de Tilarán (Tilarán range). Roughly a four-hour drive from the Central Valley, Monteverde is one of the country's major ecotourism destinations, with the Reserva Biológica Bosque Nuboso Monteverde (Monteverde Cloud Forest Reserve) being the largest, in addition to several other natural attractions which draw considerable numbers of tourists and naturalists, both from Costa Rica and abroad.

National Geographic has called the Monteverde Cloud Forest "the jewel in the crown of cloud forest reserves". Newsweek ranked Monteverde the world's No. 14 "place to remember before it disappears"; by popular vote in Costa Rica, Monteverde was deemed one of the seven natural wonders of the nation, along with Isla del Coco, Volcán Arenal, Cerro Chirripó, Río Celeste, Tortuguero, and Volcán Poás.

Alajuela (Spanish pronunciation: [alaˈxwela]) is a province of Costa Rica. It is located in the north-central part of the country, bordering Nicaragua to the north. It also borders the provinces of Heredia to the east, San José to the south, Puntarenas to the southwest and Guanacaste to the west. As of 2011, the province had a population of 885,571. Alajuela is composed of 16 cantons, which are divided into 111 districts. It covers an area of 9,757.53 square kilometers.

The provincial capital is Alajuela. Other large cities include Quesada, Aguas Zarcas, Naranjo, Zarcero, Orotina, Sarchí Norte, Upala, San Ramón, Grecia and Los Chiles.

San Carlos is a canton in the Alajuela province of Costa Rica, with an estimated population of 198,742 as of 2022. It ranks as the fourth-most populous canton in the country and is the 1st largest by area. It borders Nicaragua to the north, San Ramón, Zarcero and Sarchí the south, Río Cuarto and Sarapiquí to the east, and Los Chiles, Guatuso, Tilarán and San Ramón to the west. The capital city of the canton is Ciudad Quesada.

The canton is known for its extensive plains, high levels of rainfall, and fertile soils, which make it one of Costa Rica’s most productive economic regions. Its economy is driven by a wide range of agricultural activities, including cattle ranching, beef and dairy production, and the cultivation of crops such as sugarcane, pineapple, citrus fruits, tubers, and basic grains.