The U.S. Department of Housing and Urban Development's website offers a search-enabled database of apartments and rental units that have been registered and approved by the department. also offers information on Housing Choice vouchers, Section 8 programs and other types of public housing.

State, regional and local housing agencies can provide information about their programs and about other affordable rentals in the area, according to HUD. Contact information for public housing authorities is available on the HUD website. Individuals may apply for housing assistance through the management office for apartments that offer low-income housing.

Mercy Housing has offices in 21 states that aim to aid and educate low-income families with the objective to help them find and maintain adequate housing, states Mercy Housing. The agency's website lists all its available properties by state. More than one-third of Americans have a need for low-income housing or assistance due to lack of substantial income stemming from loss of employment, illness, disability or underemployment, Mercy Housing states. offers a search engine that lists low-income housing, affordable housing and government subsidized housing, searchable by region or city. Several other apartment locating services such as also offer databases of low-income rental units categorized by location.