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 Aserrí, 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.