We used 4 analyses to examine latitudinal patterns in geographical range sizes of New World woodpeckers and to test for the occurrence of Rapoport's rule, which predicts an increase in size of geographical ranges of species with increasing latitude. Although details of results varied among analyses, general patterns were the same. Smallest average range sizes occurred near 20°N, increasing in average size at more northerly (25°N to 60°N) and southerly (15°N to 0°) latitudes. Trends were less obvious within the southern hemisphere, but generally, species had larger average range sizes between 0° and 30°S than at higher latitudes. Therefore, although there is a positive latitudinal gradient for a portion of the northern hemisphere, data in general do not support Rapoport's rule.