Retki [ˈrɛtki] is a village in the administrative district of Gmina Zduny, within Łowicz County, Łódź Voivodeship, in central Poland. It lies approximately 3 kilometres (2 mi) north-east of Zduny, 11 km (7 mi) north-west of Łowicz, and 50 km (31 mi) north-east of the regional capital Łódź. It is located within the historical region of Mazovia.
Retki was a private church village within the Polish Crown, administratively located in the Rawa Voivodeship in the Greater Poland Province of the Polish Crown, owned by the Archdiocese of Gniezno.
During the invasion of Poland, which started World War II, on September 16, 1939, Germans murdered 22 Poles in Retki, including nine farmers from Retki and 13 refugees from the nearby town of Zgierz (see also Nazi crimes against the Polish nation).