| Native Name: | Województwo łomżyńskie |
| Conventional Long Name: | Łomża Voivodeship |
| Common Name: | Łomża |
| Subdivision: | Voivodeship |
| Nation: | Poland |
| Year Start: | 1975 |
| Year End: | 1998 |
| P1: | Białystok Voivodeship (1945–75) |
| Flag P1: | Flag of Poland.svg |
| P2: | Warsaw Voivodeship (1945–75) |
| Flag P2: | Flag of Poland.svg |
| S1: | Podlaskie Voivodeship |
| Flag S1: | Flag of Poland.svg |
| S2: | Masovian Voivodeship |
| Flag S2: | Flag of Poland.svg |
| Image Map Caption: | Map of People's Republic of Poland in 1975 with the Łomża Voivodeship. |
| Capital: | Łomża |
| Political Subdiv: | Communes |
Łomża Voivodeship was an administrative division and local government in Poland in the years 1975 to 1998, superseded by the Podlaskie Voivodeship.
Its capital city was Łomża.
Major cities and towns (population in 1998):