Following is a list of current and former courthouses of the United States federal court system located in Connecticut. Each entry indicates the name of the building along with an image, if available, its location and the jurisdiction it covers,[1] the dates during which it was used for each such jurisdiction, and, if applicable the person for whom it was named, and the date of renaming. Dates of use will not necessarily correspond with the dates of construction or demolition of a building, as pre-existing structures may be adapted for court use, and former court buildings may later be put to other uses. Also, the official name of the building may be changed at some point after its use as a federal court building has been initiated.
| Courthouse | City | Image | Street address | Jurisdiction[1] | First used | Last used | Notes |
|---|---|---|---|---|---|---|---|
| Brien McMahon Federal Building | Bridgeport | 
|
915 Lafayette Boulevard | D. Conn. | ? | present | Named after U.S. Sen. Brien McMahon. |
| U.S. Post Office & Customhouse | Hartford |
|
? | D. Conn. | 1882 | 1933 | Razed in 1934. |
| William R. Cotter Federal Building | Hartford | 
|
135 High Street | D. Conn. | 1933 | 1963 | Now used for other federal government offices. Named after U.S. Rep. William R. Cotter in 1982. |
| Abraham A. Ribicoff Federal Building | Hartford | 
|
450 Main Street | D. Conn. | 1963 | present | Named after Conn. Gov. and U.S. Rep. Abraham A. Ribicoff in 1980. |
| Richard C. Lee U.S. Courthouse | New Haven | 
|
141 Church Street | D. Conn. | 1919 | present | Named after New Haven mayor Richard C. Lee in 1998. |
| U.S. Post Office & Customhouse | New Haven | 
|
Church & Gregson Streets | D.Conn. | 1860 | 1919 | Razed in 1952. |
| John S. Monagan Federal Building | Waterbury |
|
14 Cottage Place | D. Conn. | ? | present |
| † | Listed on the National Register of Historic Places (NRHP) |
|---|---|
| †† | NRHP-listed and also designated as a National Historic Landmark |
