Programs authorized under federal or state legislation or local government initiatives that provide financial assistance and supportive services for individuals and/or families who are homeless or at risk for homelessness. Included are prevention programs that help people at imminent risk for homelessness preserve current housing or secure alternative housing; diversion programs that help people actively seeking shelter to identify and access viable alternatives including shared housing arrangements and transitional housing/shelter; and rapid re-housing programs that help people who are already homeless move as quickly as possible into permanent housing. Services may include case management, rental deposits, rent assistance, utility deposits, housing search assistance, moving expenses, expenses related to non-shelter temporary housing in situations where permanent housing has been secured but is currently unavailable, and other costs the family may incur in the process of acquiring or maintaining housing. Allowable activities, eligibility criteria and other requirements vary depending on the jurisdiction, the funding source and the focus of the program.

Programs that provide extended shelter and supportive services primarily for homeless individuals and/or families with the goal of helping them live independently and transition into permanent housing. Some programs require that the individual/family be transitioning from a short-term emergency shelter. The length of stay varies considerably by program. It is generally longer than two weeks but typically 60 days or more and, in many cases, up to two years or more. The supportive services may be provided directly by the organization managing the housing or may be coordinated by them and provided by other public or private agencies. Transitional housing/shelter is generally provided in apartment style facilities with a higher degree of privacy than short-term homeless shelters; may be provided at no cost to the resident; and may be configured for specialized groups within the homeless population such as people with substance use disorders, homeless mentally ill, homeless domestic violence victims, veterans or homeless people with AIDS/HIV. In some cases, a "transition in place" option allows families to continue living in the same complex (if not the same unit) where their transitional housing unit is located when they are ready to move to permanent housing. In other cases, the permanent housing option is either public housing or private rental housing supported by a tenant-based voucher subsidy. Included are post-domestic violence shelter housing programs that make affordable rental housing (or other accommodations) available to women, generally those who are coming directly out of a domestic violence shelter or other crisis shelter, often in apartment complexes owned by the shelter; and programs that provide transitional housing and support services for other targeted groups such as military and veteran families and others who need a temporary supportive living environment to maintain stability and begin to thrive.

Partners in a relationship who have no fixed, regular and adequate residence, who are residing temporarily with relatives or friends or who live on the street, in emergency or transitional shelters, in a hotel or motel paid for with a shelter voucher, in seriously substandard housing or in an abandoned building, place of business, car or other vehicle or other public or private place that is not ordinarily used as a regular sleeping accommodation for people.

Families, usually consisting of two parents and their children but also including single parent families, extended families and nontraditional family groups, who have no fixed, regular and adequate residence, who are residing temporarily with relatives or friends or who live on the street, in emergency or transitional shelters, in a hotel or motel paid for with a shelter voucher, in seriously substandard housing or in an abandoned building, place of business, car or other vehicle, or other public or private place that is not ordinarily used as a regular sleeping accommodation for people.

Single men who have no fixed, regular and adequate residence, who are residing temporarily with relatives or friends or who live on the street, in emergency or transitional shelters, in a hotel or motel paid for with a shelter voucher, in seriously substandard housing or in an abandoned building, place of business, car or other vehicle, or other public or private place that is not ordinarily used as a regular sleeping accommodation for people.

Single women who have no fixed, regular and adequate residence, who are residing temporarily with relatives or friends or who live on the street, in emergency or transitional shelters, in a hotel or motel paid for with a shelter voucher, in seriously substandard housing or in an abandoned building, place of business, car or other vehicle, or other public or private place that is not ordinarily used as a regular sleeping accommodation for people.