Rinse the cranberries under cold water, removing any stems or debris.
In a medium saucepan, combine the cranberries, sugar, and water. Stir well.
Add the zest of one orange to the saucepan. The citrusy notes will enhance the cranberry flavor.
Bring the mixture to a boil over medium-high heat. Once boiling, reduce the heat to low and let it simmer for about 10-15 minutes, or until the cranberries burst and the sauce thickens.
Stir in the ground cinnamon for a touch of warmth and spice. Adjust the sugar to your taste preference if needed.
Remove the saucepan from heat and let the cranberry sauce cool to room temperature. It will continue to thicken as it cools.