 Austria: 40
 Argentina: 5 on loan from the US; all returned.

 Belgium: 135
 Brazil: 386
 Brigade 2506: 5; all destroyed or captured during the Bay of Pigs Invasion.

 Chile: 60, replaced by Leopard 1V MBT.

 Denmark: 53
 Ethiopia: 54
 West Germany: 50
 Greece: 81
 Japan: 130
 Lebanon: 50
 New Zealand: 10
 Pakistan: 50
 Philippines: 7
 Portugal
 Saudi Arabia: 60
 Somalia: 10
 South Africa: 1 confirmed, presumably for evaluation purposes.
Other sources claimed anywhere from 90 to 100 in service; this resulted in significant controversy in the late 1970s.

 South Vietnam: 350
 Spain: 245
 Sudan: 53; donated by Saudi Arabia in 1981.

 Tunisia: 12
 Turkey: 100
 United States
 Austria: 40
 Argentina: 5 on loan from the US; all returned.
 Belgium: 135
 Brazil: 386
 Brigade 2506: 5; all destroyed or captured during the Bay of Pigs Invasion.
 Chile: 60, replaced by Leopard 1V MBT.
 Denmark: 53
 Ethiopia: 54
 West Germany: 50
 Greece: 81
 Japan: 130
 Lebanon: 50
 New Zealand: 10
 Pakistan: 50
 Philippines: 7
 Portugal
 Saudi Arabia: 60
 Somalia: 10
 South Africa: 1 confirmed, presumably for evaluation purposes. Other sources claimed anywhere from 90 to 100 in service; this resulted in significant controversy in the late 1970s.
 South Vietnam: 350
 Spain: 245
 Sudan: 53; donated by Saudi Arabia in 1981.
 Tunisia: 12
 Turkey: 100
 United States
M41 Walker Bulldog