Coastal Barrier Resources Reauthorization Act of 2005 - Directs the Secretary of the Interior to report to Congress on the creation of digital maps of the John H. Chafee Coastal Barrier Resources System units and other protected areas under the digital mapping pilot project. Requires the Secretary to carry out a project to create digital versions of all the remaining John H. Chafee Coastal Barrier Resources System maps and protected areas not included in the pilot project.
Establishes a program to provide grants to states to identify, assess, and recommend additional eligible coastal barriers along the Atlantic and Gulf coasts and shore areas of the Great Lakes for inclusion in the John H. Chafee Coastal Barrier Resources System or for treatment as protected areas.