Partido Integración Nacional (National Integration Party) was born as a political project in 1996, due to studies made in the Center of Studies Costa Rica Siglo XXI, group conformed by young professionals, intellectuals and university students, which during more than 10 years (from 1985) organized meetings, panel discussions, roundtables and papers about key topics for Costa Rica’s development.
The Center of Studies Costa Rica Siglo XXI, in the quest for solutions, founded the Partido Integración Nacional (PIN), party with own roots that proposes to stay away from donations or economical ties, and from other parties and private companies.
Only two years after it was founded, PIN wins the fourth place in the 1998 National Election, and representation in the Legislative Assembly with its presidential candidate, Dr. Walter Muñoz Céspedes, as well as the presidency of the Municipal Council of San José and three municipal councillors. During this period, deputy Muñoz stood out for his opposition to the project known as “Combo del ICE”.
In the 2002 Municipal Election, Partido Integración Nacional places one municipal councillor in the canton of Desamparados, province of San José; four district councillors in the canton of Valverde Vega, province of Alajuela; and two municipal councillors and a trustee in the canton of San Rafael, province of Heredia.
In the 2006 Municipal Election, PIN gains two trustees and 18 district councillors.
In the 2010 Municipal Election, PIN obtains one municipal councillor in the Catedral District, San José; and wins the second place in vote share, due to its alliance with two other parties: Alianza Patriótica and PAC. It also obtains two from six trustees in the districts of Porvenir and Bejuco, canton of Nandayure, and a total of nine district councillors with their substitutes.
In the 2016 Municipal Election, PIN gained several municipal and district councillors, and also placed two trustees in both the districts of Santa Cruz and Veintisiete de Abril, canton of Santa Cruz, Guanacaste, and also a district Mayor in Paquera, Puntarenas.
For the 2018 National Election, Juan Diego Castro Fernández runs as presidential candidate, finishing in the fifth place with 10% of the vote share. Also, PIN gains four seats in the Legislative Assembly: Walter Muñoz Céspedes y Zoila Volio Pacheco for San José, Erick Rodríguez Steller for Alajuela and Patricia Villegas Álvarez for Cartago.