| Native Name: | Księstwo łęczyckie (pl) |
| Conventional Long Name: | Duchy of Łęczyca |
| Era: | High Middle Ages |
| Status: | Province of Poland |
| Year Start: | 1231 |
| Year End: | 1352 |
| Image Map2: | Polska WladLokietka (1275-1300).png |
| Map Caption2: | Poland 1275-1300, Duchy of Łęczyca marked in violet (area of the Duchy of Łęczyca in years 1263-1352 was as shown in the map) |
| Capital: | Łęczyca |
| Government Type: | Duchy |
| Religion: | Roman Catholic |
| Event End: | Incorporated by the Polish Kingdom |
| S1: | Łęczyca Voivodeship |
Duchy of Łęczyca (pl|Księstwo łęczyckie) was one of the duchies of Poland. It was created around 1231 from Province of Łęczyca, a part of the Seniorate Province by Konrad I of Masovia. Province of Łęczyca existed since turn of the 11th/12th century.[1]
In 1264 the Duchy of Sieradz was split from it. The last duke of this duchy was Władysław the Hunchback. After his death in 1352 the duchy became part of the Kingdom of Poland and was reorganized into the Łęczyca Voivodeship.
pl:Marek Koter
. Miasto – region – gospodarka w badaniach geograficznych. W stulecie urodzin Profesora Ludwika Straszewicza . 2016 . . Tomasz Marszał (red.) . 9788380881228 . Łódź . 131–142 . pl . Historyczno-geograficzne podstawy oraz proces kształtowania się regionu łódzkiego . 2022-06-16 . https://dspace.uni.lodz.pl/xmlui/bitstream/handle/11089/18242/8-131_161-Koter.pdf#page=1.