The working poor are working people whose incomes fall below a given poverty line due to low-income jobs and low familial household income. These are people who spend at least 27 weeks in a year working or looking for employment, but remain under the poverty threshold.

In the US, the official measurement of the working poor is controversial. Many social scientists argue that the official measurements used do not provide a comprehensive overview of the number of working poor. One recent study proposed over 100 ways to measure this and came up with a figure that ranged between 2% and 19% of the total US population.

There is also controversy surrounding ways that the working poor can be helped. Arguments range from increasing welfare to the poor on one end of the spectrum to encouraging the poor to achieve greater self-sufficiency on the other end, with most arguing varying degrees of both.