Use the currency converter below to calculate the current exchange rate for the city of Mexico City. The currency used in Mexico City is the Mexican Peso. Mexico City is the capital of Mexico. If you are traveling to Mexico City, you will need to exchange your currency for the Mexican Peso. You may exchange your money for the Mexican Peso at most Mexico City banks or at specialized stores called Foreign Exchange Bureaus. Look for signs that say Bureau De Change, Geld Wechseln or Cambio.