Open Data is a recent concept in Public Management. It is one of the most important tools of Open Government, which is currently identified as an instrument to achieve better governance. Open data can be seen as a driver for economic growth through innovation and with a more participatory approach; it does not only refer to public sector information, but to other sources of collection, administration and releasing of the data. The fact of being open unravels the possibility for a broader audience to use that data, both for private or social entrepreneurship, but also to contribute to solve public problems through a collaborative and innovative way. The analysis of how Open Data policies are being implemented at municipal level in Latin America offers an opportunity to understand what the current challenges are and how municipalities are overcoming them, as well as to identify the variables that play a key role to start open data policy.