Background: Prostate cancer incidence, treatment, and survival rates vary throughout the UK, but little is known about regional differences in quality of survival. Objective: To investigate variations in patient-reported outcomes between UK countries and English Cancer Alliances. Design, setting, and participants: A cross-sectional postal survey of prostate cancer survivors diagnosed 18-42 mo previously. Outcome measurements and statistical analysis: Urinary, bowel, and sexual problems and vitality were patient reported using the Expanded Prostate Cancer Index Composite (EPIC-26) questionnaire. General health was also self-assessed. Regional variations were identified using multivariable log-linear regression. Results and limitations: A total of 35 823 men responded, 60.8% of those invited. Selfassessed health was significantly lower than the UK average in Wales and Scotland. Respondents reported more urinary incontinence in Scotland, more urinary irritation/ obstruction in Scotland and Northern Ireland (NI), poorer bowel function in Scotland and NI, worse sexual function in Scotland, and reduced vitality/hormonal function in Scotland, Wales, and NI. Self-assessed health was poorer than the English average in South Yorkshire and NorthEast and Cumbria, with more urinary incontinence in NorthEast and Cumbria and Peninsula, greater sexual problems in West Midlands, and poorer vitality in NorthEast and Cumbria and West Midlands. Limitations include difficulty identifying clinically significant differences and limited information on pretreatment conditions.