Abstract
A review of the imaging searches for planetary nebulae (PNe) in the Local Group (LG), with an updated list of references, is presented. Emphasis is put on the results of the Local Group Census, a recent survey carried out at the 2.5m INT telescope at La Palma. PNe have been searched and found in all LG galaxies with log(LV /L� ) > 6.7; very few PNe are expected to be found in less luminous galaxies. The PN population size, when corrected for the different completeness limits of the various surveys, scales pretty well with the V luminosity of a galaxy, but it is suggested that it is somewhat sensitive to the relative amount of star formation in the last 2 to 8 Gyr. Some possible evidence of the effect of star formation in the last few Gyr on the absolute magnitude of the bright cutoff of the PN luminosity function is also presented.
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