Home Office · Immigration system statistics: immigration detention detailed datasets

People in immigration detention by length of detention

June 2026 Provisional

2,152people

People in immigration detention by length of detention were 2,152 people at 30 June 2026, up 19.0% (344) from 1,808 at 30 June 2025.

▲ 19.0% · +344 against June 2025 (same quarter previous year)

Home Office snapshot
June 2026
published 27 August 2026
Det_D02
row “all rows”
column “People”
cell value sum of 623 rows

The series is rising. Rule: up 11.9% from June 2023 to June 2026.

March 2010 to June 2026

Published valueProvisional or revisedLatestShaded bands: governments (see labels)Hover or use arrow keys to read a value

What this measures

The number of people held in immigration detention on the last day of the quarter, split by how long they had been detained. This is a stock, not a flow.

What this doesn’t measure

Entries to or exits from detention during the quarter; since March 2023 the Home Office publishes length of detention as "Not available" for everyone in detention.

Important caveat

This is a snapshot count of people in immigration detention on the last day of the quarter, not a total over the quarter. Since the March 2023 snapshot the Home Office publishes length of detention as "Not available" for everyone in detention, so the length breakdown carries a single bucket for recent periods. Data from 2026 Q1 onwards is provisional.

Revision history

No period of this series has been revised since it was first ingested here. Revisions are recorded automatically when a later release publishes a different figure for the same period.

Source

Publisher: Home Office
Publication: Immigration system statistics: immigration detention detailed datasets
Release: Year ending June 2026, published 27 August 2026
Source file: immigration-detention-datasets-jun-2026.xlsx
File SHA-256: 51b4d9100ad36864bec21ce0eb9467839518ebaedfa0da128b52f8a7603634bd
Retrieved: 2 September 2026
Sheet: Data_Det_D02
Table: Det_D02
Row: all rows
Column: People
Cell value: sum of 623 rows
Geography: United Kingdom
Unit: people
API: /api/metrics/detention_population_by_length · /series · /vintages

Government periods

Change during each government, from the level inherited to the last complete period before it left office. Describes the period; does not attribute cause.

Labour 2024–	1,788June 2024	2,152June 2026	↑ 20.4%
Conservative 2019–2024	1,826September 2019	1,788June 2024	↓ 2.1%
Conservative 2017–2019	2,930March 2017	1,826September 2019	↓ 37.7%
Conservative 2015–2017	3,483March 2015	2,930March 2017	↓ 15.9%
Coalition 2010–2015	2,802March 2010	3,483March 2015	↑ 24.3%

Full comparison with chart

Release: Year ending June 2026 · publication page
Last updated: 27 August 2026
Next scheduled release: 26 November 2026 (official date)