Crime in Jersey fell by nearly half. Then it stopped falling.

The prison population peaked at an average of 185 in 2011, fell for most of the 2010s, and has risen again since: 175 on average in 2025, against a certified capacity of 200. The maximum-in-year line is the one that matters operationally, and in 2025 it reached 185. This is a headcount of people held, not a measure of crime; it moves with sentencing and remand practice as much as with offending.

A different measure from the all-collisions count further down this page. This one counts only collisions where someone was killed or seriously injured, and normalises by population. There is no trend here to speak of. The figure has moved up and down within a narrow band for seventeen years, and on an island this size a handful of collisions moves the rate visibly. That is worth stating plainly rather than reading a direction into noise.

opendata.gov.je, "Island Outcome Indicators" - Annual data (indicators 1 and 3, sourced from the States of Jersey Police); opendata.gov.je, "Prison statistics" - Prison population statistics

Guernsey: total recorded crimes (no published rate per population)

Guernsey Police / Bailiwick Law Enforcement has never published a downloadable back-series; the figures above are Bridgehead’s own reconstruction from eleven overlapping Annual Reports. In 2018, Guernsey fully adopted the UK crime recording standard, so figures either side of that year aren’t like-for-like; from 2021, offences investigated by the Guernsey Border Agency are also folded in (81 of them in 2024, the only year that split is published). No source publishes a Guernsey crime rate per population at any point in this series - every figure is a raw count, against a population (roughly 64,000) that’s little more than half Jersey’s (roughly 103,000) - which is why it isn’t set alongside Jersey’s rate-per-1,000 chart above as a single line.