Germany’s Prison Numbers Fuel Immigration Debate

Prison corridor with barred doors — Photo: NGCHIYUI / Shutterstock

Germany’s latest prison data shows foreign nationals now make up nearly half of all inmates, exposing the real cost of Europe’s open‑border experiment.

Story Snapshot

Foreign nationals account for about 45% of inmates in Germany, compared with under 20% of residents.
Several major German states now have prison populations that are more than 50% foreign.
The share of foreign prisoners has surged over the last decade, rising from roughly 30% to the mid‑40s.
Taxpayer costs linked to foreign inmates run into billions of euros each year.

Foreign Nationals Now Fill Nearly Half of German Prison Cells

German federal prison statistics now show that foreign nationals account for around 45 percent of people held in German prisons, including those in pretrial detention. Out of roughly 60,000 inmates, about 27,000 are not German citizens, according to data compiled from all 16 state justice ministries. At the same time, foreign nationals make up only about 17 percent of Germany’s resident population. This means non‑citizens are heavily overrepresented behind bars compared with their share of society.

The imbalance is even more striking when looking at trends over time. In 2017, foreign nationals made up about 30 percent of sentenced inmates in Germany. By 2024, that figure had climbed to 37 percent, and the latest combined count including pretrial detainees now sits near 45 percent. Research on German prison psychiatry found a similar pattern earlier, with foreign nationals clearly overrepresented in both the general prison population and prison hospitals compared with their share in the broader public. The numbers point to a long, steady rise, not a one‑year fluke.

City-States and Western Regions Show Extreme Overrepresentation

The share of foreign inmates is not the same across Germany; it is highest in the big city‑states and several western regions. In Berlin, foreign nationals account for 58.9 percent of prisoners, while in Hamburg the figure is about 57.95 percent. In Bavaria, Baden‑Württemberg, and Hesse, foreign nationals also make up more than half of the prison population. In contrast, eastern states such as Mecklenburg‑Vorpommern, Saxony‑Anhalt, and Thuringia see roughly one in four prisoners classified as foreign nationals. This regional gap mirrors where recent migration has been most intense.

Local snapshots underline how deep the shift runs. In the city of Heilbronn in Baden‑Württemberg, official data for May 2025 show that foreign nationals made up 54.5 percent of inmates in the local prison, despite being far fewer in the general population. The most common foreign nationalities among inmates there include Turkey, Syria, Albania, and Romania. Nationwide, reports highlight Eastern European and Arab origins as particularly common among foreign prisoners. These patterns raise hard questions about border controls, vetting of arrivals, and the impact of migration flows on crime and public safety.

Taxpayer Costs and Policy Debates Around Open Borders

German taxpayers are footing a large bill for this growing foreign share in prisons. One cross‑state analysis estimated total annual prison costs at about €4.137 billion, with around €1.815 billion spent housing foreign nationals in correctional facilities across the 16 federal states. Another report noted that foreign prisoners already accounted for more than half of the inmate population in several states while costs tied to incarcerating foreign nationals alone approached €1.82 billion per year. These figures land directly in the middle of Europe’s wider debate over migration, borders, and national budgets.

German government data also show that foreign nationals are overrepresented earlier in the justice pipeline, as criminal suspects. In 2022, non‑German suspects made up 37.4 percent of all recorded suspects, or about 29.9 percent when immigration offenses were excluded, even though foreign nationals were roughly 14.6 percent of the population at that time. Academic work and European prison surveys have tracked this overrepresentation trend for years, noting that foreign inmates rose from 28 percent of Germany’s prison population in 2005 to 31 percent in 2015, and higher since. The present near‑half share is the latest stage in a long‑running pattern tied to border and migration policy choices.