 Argentina
Argentine Naval Aviation 15 ex-USN trackers
 Australia (retired)
Royal Australian Navy
 Brazil
Brazilian Air Force
 Canada (retired)
Royal Canadian Navy 99 - 42 CSF-1 and 57 CSF-2 (43 converted as CSF-3) (1956–1968) transferred to CF during unification as CP-121 
Canadian Forces 99 CP-121 (1968–1990)
 Italy (retired)
Italian Air Force  operated 45 Grumman S2F-1 Tracker delivered in 1957 and retired in 1978
 Japan (retired)
Japan Maritime Self-Defense Force
Air Transport Squadron 61
 Netherlands (retired)
Royal Netherlands Navy
 Peru (retired)
Peruvian Navy
 South Korea (retired)
Republic of Korea Navy
 Taiwan (Republic of China) (retired)
Republic of China Air Force operated S-2A/E/G from 1967-1992, S-2T from 1992-2017, replaced by 12 rebuilt U.S. Navy P-3C Orions.

 Thailand (retired)
Royal Thai Navy
 Turkey (retired)
Turkish Navy Aerial Wing
 United States (retired)
United States Navy operated Trackers between 1954 and 1976.

United States Marine Corps operated some Trackers.

 Uruguay (retired)
Uruguayan Navy
 Venezuela (retired)
Venezuelan Navy
 Argentina
Argentine Naval Aviation 15 ex-USN trackers
 Australia (retired)
Royal Australian Navy
 Brazil
Brazilian Air Force
 Canada (retired)
Royal Canadian Navy 99 - 42 CSF-1 and 57 CSF-2 (43 converted as CSF-3) (1956–1968) transferred to CF during unification as CP-121 
Canadian Forces 99 CP-121 (1968–1990)
 Italy (retired)
Italian Air Force  operated 45 Grumman S2F-1 Tracker delivered in 1957 and retired in 1978
 Japan (retired)
Japan Maritime Self-Defense Force
Air Transport Squadron 61
 Netherlands (retired)
Royal Netherlands Navy
 Peru (retired)
Peruvian Navy
 South Korea (retired)
Republic of Korea Navy
 Taiwan (Republic of China) (retired)
Republic of China Air Force operated S-2A/E/G from 1967-1992, S-2T from 1992-2017, replaced by 12 rebuilt U.S. Navy P-3C Orions.
 Thailand (retired)
Royal Thai Navy
 Turkey (retired)
Turkish Navy Aerial Wing
 United States (retired)
United States Navy operated Trackers between 1954 and 1976.
United States Marine Corps operated some Trackers.
 Uruguay (retired)
Uruguayan Navy
 Venezuela (retired)
Venezuelan Navy
Grumman S-2 Tracker