Five people were arrested at Bournemouth's Vitality Stadium between August 2023 and last month.
Dorset Police responded to a Freedom of Information request by showing that none of the five people had been prosecuted by November 2024.
The force said one person was arrested for assault occasioning actual bodily harm and another was arrested for being drunk and disorderly in a public place.
Both of those people have been released from bail but remained under investigation last month.
One person arrested for going on to a playing area at a football match and another arrested for using threatening, abusive or insulting words with intent remained on conditional bail in November.