Based on herpetofaunal records, New Mexico is one of the most diverse states in the American Southwest. We visually summarized reptile and amphibian diversity in New Mexico using occurrence data from the past 20 years. We also identified patterns of species richness by county and discuss survey bias as a factor. In general, northwestern counties had the lowest number of species while central and southwestern regions had the highest numbers of species. We also recognized species-rich counties with few to no new county records in the past 20 years as areas that potentially reached survey saturation.