4.8% of the population for whom poverty status is determined in St. Johns, AZ (159 out of 3.31k people) live below the poverty line, a number that is lower than the national average of 12.5%. The largest demographic living in poverty are Females 45 - 54, followed by Females 15 and then Females 18 - 24.

The most common racial or ethnic group living below the poverty line in St. Johns, AZ is White, followed by Native American and Black.

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.