Which Central American countries use the U.S. dollar as their official currency?

In Central America, both El Salvador and Panama use the U.S. dollar as their official currency.1

While Panama has its own currency, the balboa, it is pegged to the U.S. dollar, which serves as the country's legal tender. El Salvador officially adopted the U.S. dollar as its national currency in 2001 as part of a broader program of economic reform. Other countries in the region maintain their own distinct national currencies, such as the Costa Rican colón.234