Assuming you don't just want to sit and watch the news (only half-joking), then:
The 100 (if you can get past the first two episodes, which seem to belong in a different show and then ignore some of the plot holes a bit later) - starts 97 years after the Earth became radioactive, with 100 kids being kicked off a space station which is running out of air, and gets more dystopian from there...(Only up to season 5 currently on Prime though I'm sure later seasons have been available elsewhere previously).
Stranger Things - a dystopian take on the 1980s (I was there. I don't remember it looking that glossy. Though it is set in the US).
The Walking Dead/Fear the Walking Dead
Glitch - great Aussie series that hardly anyone seems to have seen, but it's really that little bit different
Haven - initially based on a Stephen King concept, some of it's really far fetched but some of it is good
Travelers - Canadian TV series that nobody but me seems to have seen but has some thought provoking stuff in it (on the surface it's a crime series)
The Rain - only the first two series, though, and it is very YA-fiction in tone
Also, to go a bit more retro:
1970s Survivors, as someone else mentioned, way better than the remake although the remake did update some of the slightly questionable social values (by modern standards)
The Changes - a kids' series from the 1970s, I think it might still be on YouTube and it's seriously out there as a lot of 1970s TV was
Children of the Stones - more supernatural than dystopian but still delightfully odd
The original Twilight Zone (Black Mirror has updated some of the stories)
Also many already mentioned: The Dark; Colony; Snowpiercer; the 3%; the Umbrella Academy; Sweet Tooth...then there are other series that are more in the realms of fantasy like The Witcher, Shadow and Bone, Locke and Key that are also a great "alternative world" fix. Plus some others, like Tribes of Europa, that I can't decide if I enjoyed or not...I'm sure we could all do a nice companion thread to this one on dystopian movies as well!