The 32-year-old American, who last fought in November when he beat Haitian-Canadian Bermane Stiverne with a first-round knockout to retain his WBC heavyweight title, was arrested in Alabama last June.
Wilder, who received a 30-day suspended sentence and two years of probation on Friday (NZ time), was ordered to perform the community service at a local YMCA.
"We respect the court's ruling. Of course we were hoping a dismissal would be granted," Wilder's lawyer, Paul Patterson, said in a phone interview.