The total population of Castine is estimated to be 121 with 54 males (44.63%) and 67 females (55.37%). There are 13 more females than males in Castine.
In 2022, the population of Castine was 105, a 0.00% decrease year-by-year from 2021. Previously, in 2021, Castine's population was 105, a decline of 0.94% compared to a population of 106 in 2020.
The median age in Castine, OH is 34.4, as per 2021 ACS 5-Year Estimates. Of the total population, 29.79% were under the age of 15, 14.89% aged 15 to 29, 46.28% aged 30 to 64, 9.04% aged 65 to 84, and 0.00% were 85 years of age and older.