Gender equality and the empowerment ofwomen and girls, one of the Sustainable Development Goals,is a highly complex and challenging undertaking. We mustaddress multiple issues, discrimination, violence,education, employment, economic resources, and technology,and work across economic sectors, from agriculture tofinancial services. Achieving gender equality will requiresignificant amounts of accurate data about the situationsand struggles of women and girls. Globally, however, thereis a major gap in data that is disaggregated by sex, andthis gap often renders women’s societal, cultural, andeconomic contributions and obstacles practically invisible.It can also exacerbate existing gender divides, feeding andreinforcing biases in social programs, access to financialand other services, economic opportunities, and evendevelopment programs designed to address gender inequality.Part of the solution may be in the form of big data, which,if used effectively, can provide the volume of data neededto portray women and their situations accurately, which inturn can inform the creation of evidence-based solutions.