The last Pink Floyd album with Roger Waters is *The Final Cut*.

It’s The Final Cut, released in 1983. That was the end of the line for Waters as a member, and the band didn’t make another album without him until A Momentary Lapse of Reason four years later.

Now, if you’re trying to be pedantic, you could argue The Wall (1979) was the last real band album, because by The Final Cut it was basically a Roger Waters solo project with a Pink Floyd sticker on it. He wrote almost everything, and David Gilmour and Nick Mason barely played. But membership-wise, he was still in the band until after that record.

Don’t overthink it. The Final Cut is the last one with his name on the credits as a member. If you want a more collaborative Pink Floyd album before he left, go with Animals.