The design, implementation, andmonitoring and evaluation of livestock sector public andprivate sector investments are based on evidence andinformation generated by a multitude of data collectionsystems, including regular and one-off, or ad-hoc, surveys.This note reviews the major survey methods that areregularly implemented by developing country governments,including: the agricultural and livestock census;agricultural and livestock sample surveys; household budgetsurveys; living standards measurement studies;administrative records or routine data; and others, such asthe population and housing census and labor surveys. Itidentifies the major livestock-related indicators that thevarious surveys for which the prime target rarely islivestock are likely to generate. Understanding these datasources is critical for decision makers to make appropriateuse of available data and indicators, and is the first stepin designing and setting up a comprehensive livestock datacollection system. The note concludes by highlighting that asystem of livestock statistics must be seen as part of abroader framework of statistical collection on a nationallevel and that the effective integration of livestock data,whether derived through broader agricultural surveys,administrative records, or one-off surveys, is essential forensuring quality data which can feed into policy formulationor designing effective investments in the livestock sector.