Łódź Voivodeship (Polish: Wojewodztwo Łódzkie) was a unit of administrative division and local government in Poland from 1919 to 1939.

At the time, it covered a large portion of the mid-western part of the country, including such cities as Łódź, Piotrków Trybunalski, Sieradz and Radomsko.

The detailed results of the 1931 census by county are presented in the table below: The Voivodeship's biggest industrial center was the city of Łódź with its suburbs.

The construction of a huge public works program, called Centralny Okręg Przemysłowy, which started in the second half of the 1930s, missed this part of Poland.

The biggest rail hubs were Koluszki, Kutno, Łowicz, Skierniewice, Zduńska Wola and Łódź.