Outstanding IOP Publishing is proud to recognise excellence in reviewing, and the names listed here have been chosen by the journal editorial teams for the quantity, timeliness and quality of their reviews in 2016. All winners will receive a certificate, and the overall winner will receive a special gift from us. Without the contribution and expertise of our reviewer community, it would be impossible to maintain the high standards of the journal, and we would like to thank you all very much for your service.