Mad Max, obviously, Night of the Comet, The Quiet Earth, A boy and his dog. I think the early 80s was a good time for the genre.
Planet of the Apes, Soylent Green, and that other Charleton Heston movie with zombies that I can’t remember (not a huge fan of zombies)
The Road is a fairly recent movie that fits.
British TV had Space 1999, lots of early Doctor Who and an attempt at the Tripods series by John Christopher. By far my favorite was “Survivors” written by Terry Nation - who needs zombies when you’ve got actual problems to deal with!
Not that anyone is likely to see this older thread, but Earth Abides was just released as a series. I haven’t watched it yet, I hope it does the book justice.