| En Name: | Sudislavl |
| Ru Name: | Судиславль |
| Coordinates: | 57.8833°N 83°W |
| Map Label Position: | right |
| Image Coa: | Coat of Arms of Sudislavl (Kostroma oblast).png |
| Coa Caption: | Coat of Arms |
| Flag Caption: | Flag |
| Federal Subject: | Kostroma Oblast |
| Adm District Jur: | Sudislavsky District |
| Adm Ctr Of: | Sudislavsky District |
| Inhabloc Cat: | Urban-type settlement |
| Leader Title: | Head |
| Representative Body: | Assembly of Deputies |
| Representative Body Ref: | [1] |
| Pop 2010Census: | 4913 |
| Established Date: | 1360 |
| Current Cat Date: | 1963 |
| Postal Codes: | 157860 |
| Dialing Codes: | 49433 |
Sudislavl (Russian: Судисла́вль) is an urban locality (an urban-type settlement) and the administrative center of Sudislavsky District of Kostroma Oblast, Russia, situated 50km (30miles) from Kostroma and 345km (214miles) northeast of Moscow. Population:
In the Middle Ages, Sudislavl was a town with its own timber kremlin. Ivan IV's testament from 1572 is the first document that mentions Sudislavl.[2] A later chronicle from the local Resurrection monastery claims that Sudislavl existed as early as 1360.
In the 17th and 18th centuries Sudislavl was considered a "merchant town". The local merchants financed the construction of several stone churches which survive to this day. The Old Believers emerged as the dominant religious group in the district.
By the beginning of the 20th century, Sudislavl had entered a period of steady decline. It has not been ranked as a town since 1925.