The front counter at Princes Risborough Police Station closed yesterday after it was deemed financially unsustainable.
Thames Valley Police said lower footfall at front counters and the public increasingly using new technologies to contact the force led to the decision.
It said the closure is being made to protect front line policing and there will be no impact to response times or operational policing in the town as a result. There are no cuts to either the neighbourhood or patrol teams.
Inspector Scott Messenger said: “The way the public contact the police has changed, and continues to change, with lower footfall to station counters and much more use of other contact media such as the telephone and internet.
“In many cases it has become unsustainable to maintain a staffed counter service in the traditional format, and the cost of including front counters within replacement buildings is expensive.”
The front counter was also shut yesterday at Marlow police station.
In 2014/15, Thames Valley Police had 154 sites totalling 140,000sqm, along with 73 houses, costing £21m a year.