• Defunct police forces of England (1 C, 81 P)
• Defunct police forces of Scotland (23 P)
• Defunct police forces of Wales (12 P)

A

• Defunct airport police forces of the United Kingdom (4 P)

D

• Dublin Metropolitan Police (1 C, 4 P, 1 F)

M

• Defunct market police forces of the United Kingdom (3 P)

P

• Defunct park police forces of the United Kingdom (14 P)
• Defunct port police forces of the United Kingdom (8 P)

R

• Royal Irish Constabulary (2 C, 25 P)

• List of defunct law enforcement agencies in the United Kingdom

A

• Admiralty Constabulary
• Air Force Department Constabulary
• Army Department Constabulary

B

• Belfast Borough Police
• British Legion Volunteer Police Force

D

• Dublin Metropolitan Police

E

• Eton College Police

L

• Londonderry Borough Police

M

• Metropolitan Tabernacle Police

R

• Railway detectives in the United Kingdom
• Royal Irish Constabulary
• Royal Marine Police

U

• UK Atomic Energy Authority Constabulary