The 1990–91 season was the first season played in the Southern League since Newport County had last competed in the 1931–32 season. Newport returned to their traditional Somerton Park home after the previous season's groundshare at Moreton-in-Marsh.

Last updated: 5 May 1991.
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The previous season's Hellenic League Cup final in May ended in a 1–1 draw. The replay wasn't played until August, after the next season had already begun and Newport had been promoted to the Southern League.

^*Nuneaton Borough had four points deducted for fielding an ineligible player
^†Leicester United had one point deducted for fielding an ineligible player
^‡Willenhall Town had three points deducted for fielding an ineligible player

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