14.1% of the population for whom poverty status is determined in Castine School District, ME (111 out of 785 people) live below the poverty line, a number that is higher than the national average of 12.5%. The largest demographic living in poverty are Males 18 - 24, followed by Females 35 - 44 and then Females 18 - 24.

The most common racial or ethnic group living below the poverty line in Castine School District, ME is White, followed by Two Or More and Hispanic.

The Census Bureau uses a set of money income thresholds that vary by family size and composition to determine who classifies as impoverished. If a family's total income is less than the family's threshold than that family and every individual in it is considered to be living in poverty.