As you would expect, DHS uses robust data sources to meet the mission needs of the Department, but not all DHS data is in a form usable by the public. DHS systems do provide significant data in the form of reports and exchange content between internal and external partners. Some of this data content may be suitable for exposing to the public and these data sets are identified in the DHS Public Data Catalog.
You will find the latest collection of publicly accessible data in the DHS section on Data.gov as well as on our Data page. Here we have cataloged our collection of data sets and included short descriptions of each data set to help you find what you need. In addition we have identified a number of other data sites that can be found on the DHS Component websites. For example FEMA provides a web app to their Disaster Declaration Summaries - http://www.fema.gov/disasters.
You can also find the latest collection of DHS web and mobile applications on our Citizen Application Directory page. Here we have cataloged our collection by topic and included short descriptions of each tool to help you find what you need.