WNDU-TV, virtual channel 16.1 (UHF digital channel 42), is an NBC-affiliated television station located in South Bend, Indiana, United States. The station is owned by Gray Television. WNDU maintains studios on State Road 933 on South Bend's northern side, and its transmitter is located southeast of the St. Joseph County Fairgrounds on the city's South side. The station's studios also house production facilities for the syndicated agricultural news programs AgDay and U.S.