62.6% of the population for whom poverty status is determined in Las Marías (Las Marías Municipio), PR (535 out of 855 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 35 - 44, followed by Females 55 - 64 and then Females 35 - 44.

The most common racial or ethnic group living below the poverty line in Las Marías (Las Marías Municipio), PR is Hispanic, followed by White and Other.

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.