The official opening of Kenilworth Station, which the public were not invited to, cost more than £2,000 of taxpayers' money.
Transport Secretary Chris Grayling MP unveiled a new plaque outside the station's entrance on Friday July 20 along with other invited dignitaries.
The public were not invited because of 'security concerns', according to Warwickshire County Council.
Now, a Freedom of Information request has shown that the event cost £2,086.70 of taxpayers' money.
This included the cost of hiring equipment such as the marquee, and the cost of the plaques.
A spokesperson for Warwickshire County Council said: "The attendance of a major government official at an event means that security is imperative and it was not possible to have an open invite for all the public.
"However, it was important to mark the completion of the project with a launch. It gave us the opportunity to bring all partners together and begin discussions on future rail and transport projects that will benefit Warwickshire."