Irvington is one of six incorporated villages that lie within the town of Greenburgh. The village is governed by a mayor, who is elected every two years in odd-numbered years, and four trustees, who also serve two-year terms. Two of the trustees are elected in odd-numbered years, with the mayor and the other two in even-numbered years. Each year, the mayor appoints one of the trustees to be deputy mayor. A paid village administrator is responsible for the day-to-day operations of the village, assisted by a clerk-treasurer. The administration is divided into eleven departments: