In this work I explain what the census records are, what information they contain, and how to use them. I outline each year of the Federal Census (1790-1930) and explain them in detail. This book is designed to help the census novices and intermediate researchers come to grips with this valuable genealogical tool. Experts may also find this book useful. Including: * Detailed explanation of each census 1790-1930 with examples. * Detailed explanation for every column of data on each census, including Mortality and Slave schedules. * Charts to help calculate the approximate birth dates of persons listed on each census. * Race and Ethnicity on the census. (White, Black, Mulatto, Free Colored, etc.) * Using the census records for Slave Research (1790-1860.) * Common census errors.