Phoenix Park () is a park in the middle of Dublin, Ireland. It lies about west of the city centre, north of the River Liffey. The wall around it is 16 km long. The area within the wall is . It is one of the largest walled city parks in Europe. It has large areas of grassland and wide roads with trees on both sides. A herd of wild Fallow deer have lived in the park since the seventeenth century. The English name ("Phoenix") comes from the Irish "fionn uisce" meaning "clear water".