As the distance between science and society is collapsed with the growth of contemporary knowledge societies, so a range of different approaches to the democratic governance of science superseding its Enlightenment government is emerging. In light of these different approaches, this article focuses on the figure of the scientific citizen and the variable dimensions of a new scientific citizenship. Three models of democracy - advanced consumer, deliberative and radical/pluralist - are put forward as both partly competing and partly complementary frameworks (...) within which the new rights and responsibilities of the scientific citizen can be articulated and discussed. In each case the theory and practice of scientific citizenship are viewed against the background of contemporary developments within the field of science communication; the rise of the public understanding of science movement; the new enthusiasm for advancing public engagements with science, and the legitimate place of different forms of public protest and dissent within new designs for democratic governance. (shrink)