Australia, Britain , Canada, France, New Zealand (139), South Africa (207), and the United States used the Ventura.
Initially used, unsuccessfully, as a light bomber in the RAF. It's main success came as a maritime patrol plane in the Coastal Command.
The Venturas were used successfully on a raid of the Phillips factory at Eindhoven.
The RAF eventually received 394 Venturas.
United States Army
The Army took over 200 /264 of the Venturas originally built for the RAF. These became the R-37.
United States Navy
Based on the Coastal Commands success at using the PV-1 as a maritime patrol plan, the United States Navy decided to use it in the Pacific.
The US Navy used around 1,600 of the PV-1 Venturas.
United States Marines
In November 1943 the VMF(N)-531, first Marine night fighter unit, shot down it's first plane with a radar equipped PV-1.
Royal New Zealand Air Force
On December 24, 1943, Ventura crew in the No. 1 Squadron, shot down three Mitsubishi Zeros.
After World War II
Many were sold to other countries to be used in their air forces. Some saw use as crop sprayers and executive transports.