13.4% of the population for whom poverty status is determined in Arlington School District 3, OR (120 out of 898 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 Females 35 - 44, followed by Females 65 - 74 and then Females 25 - 34.

The most common racial or ethnic group living below the poverty line in Arlington School District 3, OR is Two Or More, followed by White 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.