For information about constitutional law research generally, please see our Constitutional Law and History Research Guide.
| Source | Dates | Notes |
|---|---|---|
| Congress.gov | Updated regularly | The Constitution Annotated contains legal analysis and interpretation of the U.S. Constitution. |
| Founder's Constitution | N/A | A collection containing the Constitution and related original-source documents. |
| GPO Access | Annotations updated through 2010 | Annotated version (2002) of the Constitution prepared by the Congressional Research Service. |
| Legal Information Institute | Annotations updated through 2000 | Annotated version (1992) of the Constitution prepared by the Congressional Research Service. |
State Constitutions
Online access to state constitutions varies widely. Please consult our state research guides for information about individual jurisdictions.