Gloucestershire County Council Trading Standards has seized more than 800 suspected counterfeit items in Gloucester.
Officers executed warrants at addresses in Kingsway and Churchdown after receiving intelligence about fake goods being sold online.
They also inspected lock-ups in the Gloucester area.
More than 500 suspected counterfeit New Era hats featuring NFL team logos were seized, along with around 300 other items including lanyards and licence plates.
The estimated value of the goods is around £13,000.
Investigations are ongoing.
Councillor Paul Hodgkinson said the operation showed the council’s commitment to tackling counterfeit goods and protecting residents and legitimate businesses.