From the U.S. Census:
The U.S. Census Bureau has released My Congressional District, the first interactive tool geared exclusively toward finding basic demographic and economic statistics for every congressional district in the U.S. This Web app uses the latest annual statistics from the American Community Survey, providing the most detailed portrait of America’s towns and neighborhoods.
Users can sort through statistics in five key categories upon selection of a specific district in the application. Summary level statistics covering education, finance, jobs and housing, as well as basic demographic information, can quickly be displayed, downloaded and shared with others.
[Our emphasis] A major feature of the My Congressional District app is the ability to embed a selected 113th congressional district on a user’s own webpage. The embedded district will display the latest statistics from the American Community Survey, allowing visitors to quickly view statistics for any of the 435 congressional districts and the District of Columbia.
Direct to My Congressional District