For the championship defended at Pro Wrestling ZERO1-MAX, see NWA United National Heavyweight Championship.

The NWA United National Championship (often abbreviated to UN Championship) was a professional wrestling championship sanctioned by the National Wrestling Alliance, and best known for being defended in All Japan Pro Wrestling. It was unified into the AJPW Triple Crown Heavyweight Championship, along with the PWF Heavyweight Championship and the NWA International Heavyweight Championship, in 1989.

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