Fifteen officers from South Yorkshire Police were dismissed, resigned or retired over a two year period following allegations of gross misconduct, new figures show.
Their names were among 833 added to the police 'Disapproved Register' between December 2013 and November 2015, with 11 South Yorkshire officers dismissed.
Three resigned and one retired while subject to gross misconduct investigations.
The register was introduced to prevent police officers from re-entering the service after being dismissed for misconduct or resigning or retiring while subject to a gross misconduct investigation where there would have been a case to answer.
Nationally, half of all police officers facing gross misconduct investigations in the last two years resigned or retired before their cases were heard, new figures show.
A total of 833 officers were added to the Disapproved Register by forces in England and Wales in its first two years, the College of Policing said.
Of the 369 who left between December 2014 and November 2015, 202 were dismissed, 147 resigned and 20 retired; while in the 12 months from December 2013, 215 were dismissed, 219 resigned and 30 retired.
The numbers of officers leaving before their cases were resolved, totalling 416 over the two-year period, comes despite Government steps to bar them from doing so in an amendment to police regulations, which came into effect in January 2015 but did not apply to ongoing investigations.
Among them were 34 officers accused of having a relationship with a vulnerable person, 11 who faced allegations of sexual conduct towards colleagues and 30 accused of domestic abuse.
Of the reasons for leaving the service over the two years, through dismissal, retiring or resigning, the highest number - 107 - did so because of a failure to perform their duty, followed by data misuse at 89 and giving false evidence at 74.
College of Policing standards manager, Detective Superintendent Ray Marley, said: "There is a misconception that police do not report wrongdoing by their colleagues and this is clear evidence that they are confronting unacceptable behaviour and using formal misconduct mechanisms to hold their colleagues to account.
"The number of officers on the register represents a tiny percentage of the overall workforce which shows the level of misconduct across the service is low. However, the police are not complacent and will continue to report colleagues they believe have been involved in wrongdoing.
"The police have more than six million interactions a year with the public and confidence is rising. This is reflected by the Office for National Statistics which showed the proportion of adults who feel local police are doing a good or excellent job in 2013/14 was 63 per cent, compared to a positive rating 10 years previously of 47 per cent."
Detective Superintendent David Barraclough, head of South Yorkshire Police’s professional standards department, said: “In South Yorkshire, we expect our officers to behave with integrity and professionalism and take very seriously any reports of wrongdoing.
“It is right for the public to expect the highest of standards from us. It only takes the actions of a few to tarnish the reputation of those who work incredibly hard every day to protect the public.
“Our position reflects the national picture in that the majority of our dismissals are as a result of internal conduct investigations. This demonstrates a real willingness and determination to report, confront and deal with unacceptable behaviour within the police service.
“Consequently, we have been successful at identifying criminal and corrupt officers from within and will continue to publicise misconduct findings and court cases on our website and social media."