 Angola
Angolan Air Force
 Benin
Benin Air Force
 Cambodia
Royal Cambodian Air Force – Former operator.

 Cameroon
Cameroon Air Force
 Croatia
Croatian Air Force – Former operator.

 Germany
German Air Force
German Army – Former operator.

German Navy
 Greece
Hellenic Air Force
 Israel
Israeli Air Force
 Katanga
Force Aérienne Katangaise
 Kenya
Kenya Air Force
 Khmer Republic
Khmer Air Force
 Lesotho
Police Mobile Air Unit
 Malawi
Malawi Army Air Wing
 Morocco
Royal Moroccan Air Force
 Mozambique
Military of Mozambique 3 Dornier 28 in service
 Niger
Nigerien Air Force
 Nigeria
Nigerian Air Force – 11 Dornier Do128 as of December 2012
 Spain
Spanish Air Force – 1 plane used by the Spanish Governor of Equatorial Guinea.
After the independence, it was transferred to the Test Flight Centre in Torrejon AB.
No longer in service.

 Serbia
Serbian Air Force
 Turkey
Turkish Army Aviation
 Yugoslavia
SFR Yugoslav Air Force – Former operator.

 Zambia
Zambian Air Force
 Angola
Angolan Air Force
 Benin
Benin Air Force
 Cambodia
Royal Cambodian Air Force – Former operator.
 Cameroon
Cameroon Air Force
 Croatia
Croatian Air Force – Former operator.
 Germany
German Air Force
German Army – Former operator.
German Navy
 Greece
Hellenic Air Force
 Israel
Israeli Air Force
 Katanga
Force Aérienne Katangaise
 Kenya
Kenya Air Force
 Khmer Republic
Khmer Air Force
 Lesotho
Police Mobile Air Unit
 Malawi
Malawi Army Air Wing
 Morocco
Royal Moroccan Air Force
 Mozambique
Military of Mozambique 3 Dornier 28 in service
 Niger
Nigerien Air Force
 Nigeria
Nigerian Air Force – 11 Dornier Do128 as of December 2012
 Spain
Spanish Air Force – 1 plane used by the Spanish Governor of Equatorial Guinea. After the independence, it was transferred to the Test Flight Centre in Torrejon AB. No longer in service.
 Serbia
Serbian Air Force
 Turkey
Turkish Army Aviation
 Yugoslavia
SFR Yugoslav Air Force – Former operator.
 Zambia
Zambian Air Force
Dornier Do 28