# Australia: Royal Australian Air Force (Glock 19), Australian Customs (Glock 17), and all Australian police services (Glock 17, 19, 22, 23, 26, 27) except the South Australia Police and Victoria Police. A Glock 17 outfitted with a thumb safety was designed specifically for the Tasmania Police.[42]
# Flag of Austria.svg Austria: Austrian Armed Forces (Glock 17 designated Pistole 80).[43][44]
# Flag of Belgium (civil).svg Belgium: Belgian police (Glock 17),[44] Belgian State Security Service.[45]
# Flag of Canada.svg Canada: Numerous local law enforcement agencies to include: Calgary, Edmonton, Ottawa, Saskatoon, South Coast British Columbia Transportation Authority Police Service, Toronto.[44]
# Flag of Ecuador.svg Ecuador: National Police, various special police units such as the GOE and GIR.[44]
# Flag of Fiji.svg Fiji: Tactical Response Unit.[46]
# Flag of Finland.svg Finland: The primary service firearm of the police.[47] Also in use by the Defence Forces, Department of Corrections (Vankeinhoitolaitos) and Border Guard.[48]
# Flag of France.svg France: French Army—certain naval and parachute units (Glock 17).[49]
# Flag of Georgia.svg Georgia: Special forces.[44]
# Flag of Germany.svg Germany: GSG 9 of the German Federal Police,[44] Spezialeinsatzkommandos (special response teams) of several state police departments.
# Flag of Hong Kong.svg Hong Kong: Special Duties Unit, Hong Kong Police Force.[44]
# Flag of Iceland.svg Iceland: Icelandic National Police, Víkingasveitin, ICRU.[50][51][52]
# Flag of India.svg India: Special Protection Group and National Security Guards (both use the Glock 17).[44]
# Flag of Indonesia.svg Indonesia: Indonesian Army Kopassus, Indonesian National Police Force, Detachment 88.[citation needed]
# Flag of Iraq.svg Iraq: Iraqi security forces (largest user, purchased 125,163 Glock 19s).[53]
# Flag of Italy.svg Italy: Italian special forces—GIS, NOCS, "Col Moschin" Regiment, COMSUBIN, Intelligence and State Security.[citation needed]
# Flag of Jordan.svg Jordan: Presidential Guard.[44]
# Flag of Latvia.svg Latvia: Latvian Military (Glock 17), police.[54]
# Flag of Lithuania.svg Lithuania: Lithuanian Armed Forces (Glock 17).[55]
# Flag of Macedonia.svg Macedonia: Special police forces, traffic police[citation needed]
# Flag of Mexico.svg Mexico: Secretaria de Marina.[44]
# Flag of the Netherlands.svg Netherlands: Military of the Netherlands (Glock 17),[56] Dutch police (Glock 17, about 250 pistols in use as a stopgap measure).[57][58][59]
# Flag of New Zealand.svg New Zealand: New Zealand Police (Glock 17).[60]
# Flag of Norway.svg Norway: Royal Norwegian Army (Glock 17 designated P-80).[44]
# Flag of the Philippines.svg Philippines: Philippine National Police, National Bureau of Investigation (NBI), National Intelligence Coordinating Agency (NICA), Philippine Drug Enforcement Agency (PDEA).[44]
# Flag of Poland.svg Poland: Polish police,[61] Polish Military Police (Glock 17).
# Flag of Portugal.svg Portugal: Used in the police HK PSP, GNR (Glock 19) , In the Portuguese armed forces (Glock 17)... Glock 18c is also used in the DAE.[citation needed]
# Flag of Romania.svg Romania: Issued to deployed and several special operations units.[citation needed]
# Flag of Spain.svg Spain: Guardia Civil's UEI (Glock 17).[62]
# Flag of Sweden.svg Sweden: Swedish Armed Forces (Glock 17 designated Pistol 88 and Glock 19 as Pistol 88B,[63][64]) Swedish Customs Service, Swedish Coast Guard.
# Flag of the Republic of China.svg Taiwan: Garrison Command. National Intelligence Coordinating Agency.[citation needed]
# Flag of Thailand.svg Thailand: Policeman in 3 south province by G2G buying condition. (Glock 19, 2,238 pcs.) and some policeman, soldier and citizen nationwide. (some models)[44]
# Flag of the United Kingdom.svg United Kingdom: Greater Manchester Police, Tactical Firearms Unit Specialist Firearms Command of the London Metropolitan Police Service,[65] Police Service of Northern Ireland and certain Scottish Police Specialist Firearms Units (Glock 17).[66]
# Flag of the United States.svg United States: FBI, Department of Treasury IRS Criminal Investigation Division,[67] DEA,[68] EPA Criminal Investigation Division, New York City Police Department, Los Angeles Police Department, Philadelphia Police Department, thousands of other agencies at the national, state, and local levels.
# Flag of Venezuela.svg Venezuela[44]