Purpose. Despite increasing evidence of adverse effects on informal carers of caring for stroke survivors, little is known about the characteristics of carers and survivors that influence carer outcomes. The purpose of this review is to summarize factors influencing outcomes in carers of stroke survivors. Methods. A systematic review of studies identified from English language medicine, nursing and psychology databases from 1996 - 2006 was carried out. Results. Thirty-nine studies were identified. Studies from Europe and the USA investigating negative carer outcomes dominated.