NFL legend Frank Gore has been hit with an assault charge ... after cops say he was involved in a domestic violence incident with a 28-year-old woman last month.
The Atlantic City Police Dept. tells TMZ Sports ... back on July 31 at around 8:11 a.m., officers were called to the Tropicana Atlantic City in New Jersey regarding a report of a domestic violence dispute.
Cops say a 28-year-old woman, who they did not identify, was speaking with hotel security ... but "did not exhibit signs of injury and complaints were not filed at the time.