It depends on the denomination.
Those with lineage traced to the Catholic Church tend to have Diaconal Ministry reflect that of the Catholic Church. Meaning it is a ministry of servanthood with additional liturgical responsibilities. They consider them as part of the clergy.
Those from bible based churches tend to call their parish council the “Board of Deacons” or something similar.
Presbyterian Churches of have deacons that are commissioned to some ministry in the church, but not with liturgical responsibilities. At least that is my understanding.