Indicative rates, not an offer. Averaged from real buy and sell prices.
The Dominican peso (DOP) is the national currency, and US dollars are widely accepted in tourist areas, so dollar–peso exchange dominates, with euros close behind. Santo Domingo has the most offers, followed by Santiago de los Caballeros, Punta Cana, Puerto Plata and La Romana.
Banks and licensed exchange agencies (agentes de cambio) operate in city centres and tourist zones; remittance agencies are also everywhere. In the Dominican Republic, P2P offers let you exchange US dollars for Dominican pesos directly with another person, in cash or by transfer.
Below are exchange offices from open sources.