1. Rinse cranberries with cold water. In a medium saucepan, add sugar, water, and orange juice. Stir until sugar dissolves. Bring to a boil and add cranberries and orange zest. Return to a boil and then reduce heat to medium low. Cook until cranberries start to burst, about ten minutes.
2. Remove from heat and let cool to room temperature. Pour sauce into a serving bowl and chill in the refrigerator. Serve chilled.