World Prison Brief · 193 jurisdictions · % of the prison population
Share of foreign nationals in the prison population, as a percentage — a ratio, not addable.
World Prison Brief (Institute for Crime & Justice Policy Research), 193 jurisdictions covered (data missing for 23).
A very skewed distribution (median around 5.9%): a handful of micro-states and tax havens with large expatriate populations reach up to 100%.
Liechtenstein tops out at 100% foreign prisoners, followed by Monaco (90%), the United Arab Emirates (88%) and Qatar (85%) — a demographic artefact rather than a particular migration signal: in these micro-states and Gulf monarchies, foreign residents already make up the majority, or near-totality, of the population itself.