Local 4 can refer to American labor unions and broadcast stations:
"Local 4" refers to a Medway, Massachusetts-based trade union, designed as "IUOE Local 4" by the International Union of Operating Engineers The moniker Local 4 is used by the following stations that broadcast on channel 4: KAMR-TV, an NBC affiliate in Amarillo, Texas KSNB-TV, an NBC affiliate in Superior, Nebraska WDIV-TV, an NBC affiliate in Detroit, Michigan WHBF-TV, a CBS affiliate in Rock Island, Illinois