Demographic parameter estimates for the regional population of African Penguins Spheniscus demersus in Namibia have been lacking, preventing the reliable estimation of population trends or an understanding of the causal factors behind trends. The overall aim of this study was to provide estimates for a range of demographic parameters for African Penguins in Namibia and to assess the accuracy of various monitoring techniques used to obtain them. Most data were collected at the four main penguin breeding localities in Namibia, which support 96% of the penguin population in the region. Data included time series of two-weekly counts of moulting penguins in juvenile and adult plumage, monthly counts of active nests, as well as monitored breeding attempts and re-sightings of banded individuals.