This paper evaluates a 20-item assessment of citizenship literacy in an adult sample comprising 179 persons of English-speaking and non-English speaking background. The results indicated that the assessment was internally consistent and that as expected it distinguished English-speaking from non-English speaking participants. The pattern of answers provided an initial, albeit partial, understanding of what might constitute citizenship information but it also highlighted some limitations. The assessment failed to tap the ability levels of those with higher knowledge. Nevertheless, the results also indicated some deficits in adult general knowledge. The potential failure rate even with a cut-off point of 60% correct was quite high. Just over one-in-five failed to pass. The results have implications for the proposed revisions to the Australian Citizenship Test. (Contains 4 figures and 1 table.)