 The average household size was 2.52 and the average family size was 2.95.Gouldsboro's age distribution was 23.9% under the age of 18, 5.2% between the ages of 18 and 24, 19.9% between 25 and 44, 34.7% between 45 and 64, and 16.3% 65 years of age or older.The population's median age was 45.4 years.