This chapter examines the self-descriptions used by petitioners when addressing Parliament. Through these labels, petitioners forged and asserted their collective identities and made claims on the state and the wider political community. Petitions did not merely reflect existing identities, but actively constituted them. The chapter first examines the broadening of the petitioning public. There was a shift from the typical mode of self-styling used by eighteenth century petitioners, which reflected perceived economic interests and the hierarchical structuring of local communities, to demotic, ostensibly egalitarian labels such as ‘inhabitants’ in the nineteenth century. The second half of the chapter examines how Catholics, Protestant Dissenters, and women, came forward as petitioners to claim rights and assert their collective identities. Supporters, opponents, and parliamentary advocates interpreted petitions in favour of Catholic emancipation as representing Irish Catholics as a collective force. Dissenters asserted their collective identity as petitioners claiming civil rights, but also in presenting themselves as moral authorities. Finally, women became more forthright in claiming rights as ‘women’ rather than limiting their interventions to moral and religious issues permitted by the norms of Victorian gender ideology.