Since Feb 2016, Arlington County has been publishing datasets to its Open Data Portal. The site currently has close to 200 datasets. Most of the datasets are essentially reports from County systems that record the activity related to County services, for example real estate property values, tennis court reservations and construction permits. But tax dollars pay for a lot of other kids of data collection and data analysis, and consequently, there are numerous other sources of open data. For example, the County regularly conducts surveys to gauge constituent opinions on a wide range of topics. This data – with all possible personally identifiable information removed – is a candidate for open data. Aggregated data is another source of information that could be published. A report offers a line of data for every transaction but aggregate data summarizes and organizes this information in useful and reusable ways. Aggregate data is also a way to share information securely when sharing the individual transactions would be a breach of privacy. When you have a challenge or an opportunity that could be informed by data, be creative. That dataset may exist and could be just a request away.