37% of the near 1700 islanders who took part in the police community survey had no or little confidence in the force's ability to tackle crime.
Of the 1,698 people taking the survey, 16% had been a victim of crime, and 76% reported the incident. But of those, 36% were satisfied with the quality of service they received.
Guernsey Police, while admitting there is room for improvement, say that victim dissatisfaction levels are on a par with UK forces.
Police scored highly in terms of the perception that they can respond to an emergency, do it quickly, and are there if the public needs to call them.
The effectiveness of the police complaints system, which has been in the spotlight since last summer and is changing, did not rate well, with a majority showing dissatisfaction in the way their complaint was dealt with.
Poor communication and a lack of urgency were highlighted as issues, but others found officers to be professional, understanding and experienced.
In terms of crime and the fear of crime, being the victim of a car crash or speedster rated highly, as did theft and public violence or assault.
Guernsey Police say the number of people taking part, and the spread of age and gender, make the survey useful for analysis and future decision-making.
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