1 Definition and terminology

1.1 Core meaning

An internally displaced person is an individual who has been compelled to leave a habitual home or place of residence but who continues to stay within the borders of the same country. The displacement may be temporary or long term, and the person may move more than once before reaching a place of relative safety. The term is used in humanitarian work, law, and public policy to describe people who have lost normal access to shelter, livelihoods, and services without becoming cross-border refugees.

1.2 Distinction from refugees

IDPs differ from refugees in one essential respect: they do not cross an international frontier. As a result, they remain under the jurisdiction of their own state rather than seeking protection from another country. In practice, this difference affects legal status, assistance arrangements, and the agencies involved in response. Although both groups may experience severe hardship, the protection framework for IDPs is built primarily around national responsibility and internal humanitarian action.

Internal displacement can arise from several broad situations, and the label often depends on the main cause of movement. Some people are displaced by warfare or civil unrest, while others leave because of floods, earthquakes, drought, or projects that require land clearance. These categories may overlap when a single crisis combines violence, environmental stress, and economic disruption.

1.3.1 Conflict-induced displacement

This type of displacement occurs when people flee fighting, insecurity, shelling, raids, or the collapse of local order. It is often sudden and may involve repeated movement as front lines shift or threats spread to new areas. Conflict-induced displacement can last for years when return is blocked by ongoing danger or damaged infrastructure.

1.3.2 Disaster-induced displacement

Disaster-induced displacement results from natural hazards such as floods, landslides, storms, earthquakes, volcanic eruptions, wildfires, or prolonged drought. Some events cause immediate evacuation, while others gradually erode livelihoods and force families to move in search of safety and resources. In many cases, people return after the emergency phase, but some remain displaced when homes and services cannot be restored quickly.

1.3.3 Development-induced displacement

This form of displacement is linked to large infrastructure, urban renewal, mining, dam construction, conservation schemes, or other projects that require relocation of residents. People may lose homes, farmland, or access to community resources, even when the project is presented as beneficial in broader economic terms. Such displacement can be especially disruptive when compensation, consultation, and resettlement planning are limited.

2 Causes of internal displacement

2.1 Armed conflict and violence

Armed conflict is among the most common drivers of internal displacement. People may flee direct attacks, indiscriminate violence, forced recruitment, intimidation, looting, or destruction of property. In some settings, fear alone can be enough to trigger movement, especially when civilians believe that remaining would expose them to grave harm.

Natural hazards can uproot large populations within hours or days. Sudden events such as floods and earthquakes often destroy housing and critical infrastructure, while slower processes such as drought and sea-level rise can undermine farming, water access, and income. Climate-related stress may also intensify existing vulnerability, making it harder for households to remain in place.

2.3 Infrastructure and development projects

Road building, dam creation, mining, industrial expansion, and other land-use changes can require relocation of residents. Displacement may occur through formal expropriation or through indirect pressure when land and services become inaccessible. Where planning is weak, affected communities may lose social ties, economic stability, and cultural connections to place.

2.4 Human rights violations and persecution

People may be displaced by threats, harassment, discrimination, forced evictions, or other abuses that make normal life impossible. Such movement can accompany conflict or occur in more localized settings where individuals are targeted by authorities, armed groups, or criminal actors. In these cases, displacement is closely tied to insecurity and the breakdown of legal protection.

3.1 International principles

The protection of internally displaced persons is grounded in international human rights law, humanitarian norms, and state duties toward people within national borders. Although no single treaty for IDPs exists on the same model as refugee law, a widely accepted body of principles outlines minimum standards for prevention, protection, assistance, and durable solutions. These norms emphasize that displacement itself does not remove basic rights.

3.1.1 Guiding Principles on Internal Displacement

The Guiding Principles on Internal Displacement provide a widely used framework for states, humanitarian agencies, and other actors. They summarize protections relevant before displacement, during flight, and after people have reached safety. The principles are not a treaty, but they have become influential in policy development, emergency response, and legal interpretation.

3.1.1.1 Background and status

The Guiding Principles were developed to consolidate existing legal protections applicable to internally displaced persons. They have been referenced in national legislation, regional instruments, and operational guidelines. Their authority comes from broad acceptance rather than formal treaty ratification, which has made them adaptable across different displacement contexts.

3.1.1.2 Key protections

The principles address protection from arbitrary displacement, access to humanitarian assistance, family unity, documentation, property, education, health care, and safe return or resettlement. They also stress that IDPs should be protected against discrimination and coercion. In practice, these safeguards help define what governments and responding agencies are expected to provide.

3.2 National laws and institutions

Many states have adopted laws, policies, or administrative bodies to manage internal displacement. These arrangements may define who qualifies as displaced, how assistance is delivered, and which agencies coordinate response. Effectiveness varies widely, depending on governance capacity, security conditions, and the availability of resources.

3.3 Rights and responsibilities of states

Because IDPs remain inside their own country, the primary duty to protect and assist them lies with national authorities. States are expected to prevent arbitrary displacement when possible, reduce harm during crises, and support recovery afterward. When state capacity is limited, international agencies and nongovernmental organizations often supplement national efforts, but they do not replace the underlying responsibility of government.

4 Living conditions and humanitarian needs

4.1 Shelter and housing

Loss of housing is one of the most immediate consequences of displacement. IDPs may live in damaged buildings, temporary shelters, tents, public facilities, or overcrowded rentals. The quality of shelter affects privacy, safety, exposure to weather, and the ability to maintain family life.

4.2 Food and nutrition

Displacement frequently disrupts food production, markets, and household income. Families may depend on aid, informal labor, borrowing, or reduced meals. Children, pregnant women, and older persons are especially vulnerable to malnutrition when access to diverse and sufficient food is limited.

4.3 Health care and sanitation

Crowded living conditions, poor water supply, and damaged health systems increase the risk of disease. Displaced populations often face interruptions in treatment for chronic illness, maternal care, vaccinations, and mental health support. Sanitation challenges can be acute in temporary settlements where waste disposal and clean water are inadequate.

4.4 Education and livelihood support

Displacement can interrupt schooling, reduce literacy progress, and limit future opportunities. Livelihoods are also affected when farmland, tools, shops, or transport routes are lost. Assistance may include school access, catch-up classes, cash support, vocational training, or help restoring economic activity.

4.5 Protection and security concerns

IDPs may face exploitation, gender-based violence, forced recruitment, theft, trafficking, or harassment. These risks can increase in overcrowded camps, unsafe urban areas, or locations with weak policing. Protection efforts aim to reduce exposure to harm and to ensure access to legal remedies and support services.

5 Displacement settings

5.1 Camps and collective centers

Some displaced people are housed in planned camps or collective centers such as schools, warehouses, or public buildings. These settings can facilitate service delivery and registration, but they may also create dependency and crowding. Conditions vary widely according to management, funding, and the length of stay.

5.2 Host communities

Many IDPs live with relatives, friends, or unrelated households in nearby towns and villages. This arrangement can offer familiarity and social support, but it may also strain local resources and raise housing costs. Host communities often share food, water, school places, and health facilities with displaced arrivals.

5.3 Informal settlements

Informal settlements are unplanned living areas that may grow on vacant land, in peripheral zones, or near urban infrastructure. They often lack secure tenure, reliable services, and formal recognition. Residents may remain there for long periods when other housing options are unavailable.

5.4 Urban displacement

Urban IDPs usually blend into larger city populations rather than living in clearly marked camps. They may rent rooms, stay with relatives, or move between neighborhoods in search of work and services. Because they are dispersed, they can be harder to identify and assist than people in organized settlements.

6 Assistance and protection

6.1 Humanitarian response

Humanitarian response to internal displacement aims to provide life-saving support, reduce suffering, and protect rights. It often involves coordination among government agencies, local organizations, international agencies, and community leaders. The response may evolve from emergency relief to longer-term recovery as conditions change.

6.2 Monitoring and registration

Registration systems and monitoring exercises help identify who has been displaced, where they are located, and what needs they face. Such information supports aid planning, service delivery, and protection work. At the same time, data collection must be careful not to expose people to further risk.

6.3 Emergency aid and service delivery

Emergency assistance typically includes food, water, shelter materials, sanitation, medical care, and basic household items. Service delivery may also involve legal aid, psychosocial support, education services, and cash assistance. The mix of support depends on the setting and on the gaps created by displacement.

6.4 Durable solutions planning

Early planning for durable solutions helps prevent prolonged dependence on emergency aid. This requires assessing whether people can return, integrate locally, or move elsewhere safely and with dignity. Effective planning considers housing, documentation, livelihoods, safety, and access to essential services.

7 Durable solutions

7.1 Return

Return means going back to the place of origin once conditions are sufficiently safe and sustainable. Successful return usually depends on restored housing, access to land or property, and basic services. Return does not always end vulnerability, especially if livelihoods remain weak or damage has not been repaired.

7.2 Local integration

Local integration occurs when displaced people settle permanently in the area where they found refuge. This can involve legal status, housing security, employment, and inclusion in local services. It is often a practical option when return is unsafe or impossible.

7.3 Relocation or resettlement

Relocation involves moving IDPs to a different location within the country, often through planned housing or land allocation. This option may be used when the original area is unsafe or unusable. Its success depends on consent, adequate compensation, and the availability of jobs, schools, and services.

7.4 Reintegration and recovery

Reintegration refers to the restoration of social, economic, and civic life after displacement. Recovery can include rebuilding homes, reestablishing livelihoods, reconnecting families, and repairing community relations. It is often gradual and may continue long after the immediate crisis has ended.

8 Data, measurement, and demographics

8.1 Estimating IDP populations

Counting internally displaced people is difficult because movement may be repeated, informal, or hidden. Estimates often rely on government records, humanitarian assessments, satellite data, and surveys. Numbers can change quickly as new crises emerge or as families return home.

8.2 Registration systems and surveys

Registration systems help organize assistance, but they may not capture everyone, especially in remote or urban areas. Surveys can provide broader estimates and reveal patterns of need, though they require time and technical capacity. Combining multiple methods often produces the most reliable picture.

8.3 Length of displacement

Some displacement lasts only days or weeks, while other cases continue for many years. The duration depends on the cause of movement, the speed of recovery, and whether a durable solution becomes available. Long-term displacement can create a semi-permanent condition in which emergency and ordinary life overlap.

8.4 Vulnerable groups

Certain groups among the displaced face distinct risks because of age, disability, dependency, or social isolation. Their needs may be overlooked if assistance is designed for the average household rather than for people with specific challenges. Targeted support is often necessary to ensure fair access to protection and services.

8.4.1 Children

Children may lose parents, schooling, stability, and access to safe play. Displacement can expose them to labor, exploitation, early marriage, or recruitment by armed actors. Child-focused services often include family tracing, learning support, and child protection programs.

8.4.2 Older persons

Older persons may struggle with mobility, chronic illness, and dependence on family care. They can be overlooked during rapid evacuation or when aid systems rely on travel and long queues. Assistance often needs to account for medicine, mobility aids, and home-based support.

8.4.3 Persons with disabilities

Persons with disabilities may face barriers in evacuation, shelter access, communication, and service delivery. Displacement can intensify preexisting exclusion when facilities are not accessible or information is not available in suitable formats. Inclusive planning is important for safety, dignity, and equal participation.

9 Social and economic impacts

9.1 Family separation and community loss

Displacement often separates families and weakens neighborhood networks. People may lose contact with relatives, neighbors, religious groups, and customary support systems. The loss of familiar social structures can be as disruptive as the loss of property.

9.2 Employment and income disruption

When displacement interrupts work, households may lose wages, crops, businesses, or livestock. New income sources are often unstable and lower paid than previous livelihoods. Economic pressure can force difficult decisions about schooling, housing, and migration.

9.3 Education interruption

Children and young people frequently experience broken schooling, missed exams, and difficulty transferring records. Even short interruptions can affect long-term learning outcomes. Reestablishing education is a major part of recovery because it supports stability and future opportunity.

9.4 Psychosocial effects

Displacement can produce stress, grief, anxiety, and a sense of uncertainty about the future. Exposure to violence, loss, and repeated upheaval may affect both mental health and social relationships. Community support, counseling, and predictable routines can help reduce the burden.

10 History and global examples

10.1 Early recognition of internal displacement

Although displacement within national borders is ancient, the modern concept of the IDP emerged more clearly in the late 20th century. Humanitarian agencies and legal scholars began to recognize that people who did not cross a border could still require specific protection. This recognition shaped later policy, monitoring, and assistance systems.

10.2 Major displacement crises

Large internal displacement crises have occurred in many regions and historical periods, often linked to war, state collapse, disaster, or large-scale development. These episodes have helped define common challenges such as camp management, return planning, and the difficulty of long-term recovery. Major crises also contributed to the growth of specialized humanitarian coordination.

10.3 Regional patterns of internal displacement

Patterns of internal displacement differ by region because of variation in conflict intensity, disaster exposure, urbanization, and state capacity. Some areas experience frequent short-term evacuations, while others face prolonged camp populations or large urban caseloads. Regional conditions influence how people move, where they settle, and what forms of assistance are most effective.