The aim of this study was to explore possible regional differences in the use of coercion in psychiatric care as experienced by patients and relatives. At four psychiatric care settings in different parts of Sweden, 138 committed and 144 voluntarily admitted patients were interviewed at admission using the Nordic Admission Interview. At discharge or, if the care episode was still ongoing, after 3 weeks of care, a follow-up patient interview and an interview with 162 relatives of these patients took place. In one of the centers, where involuntarily admitted patients were treated without locking the doors of the wards, the patients reported less coercion at admission than in the other three centers. Regarding the patients' reports of the use of coercive measures, personal treatment and outcome of care, and concerning the relatives' experiences, few differences were found between centers among committed and voluntarily admitted patients, respectively. Coercion in psychiatric care, as reported by patients and relatives, was not always legally based, and many of the patients reported they felt violated during the admission process. Only a minority of patients and relatives reported participation in treatment and care planning, as regulated by law. Still, a majority of both committed and voluntarily admitted patients reported they had been well treated by the personnel at admission as well as during the stay at the ward, and that they had been improved in their mental health after the psychiatric care episode.