I get a little giddy whenever someone asks about Atlantis in the comics, because it’s one of those mythologies that’s been reshaped so many times it feels alive. If you want the seeds, you have to start way back with 'More Fun Comics' #73 (1941) — that’s Aquaman’s first appearance and the original, simple origin that plants the idea of a missing or hidden sea civilization. From there, Bronze and Silver Age anthology spots in titles like 'Adventure Comics' gradually built the supporting cast and royal angle around Atlantis, though continuity was fluid for decades.
If you want the versions that really define modern Atlantis, I point people to two big turning points. First, the 1990s Peter David run (early '90s 'Aquaman' issues) dug into Atlantean politics, family betrayal, and the cultural friction between surface people and the sea. Then the 2010s overhaul around 'Brightest Day' and Geoff Johns’ take in the 'Aquaman' (2011) relaunch — often packaged with the 'Throne of Atlantis' crossover (which ties into 'Justice League' issues) — gave us the royal lineage of Atlanna, the vengeful Orm/Orm’s motivations, and wild additions like the Trench monsters. Dan Abnett’s 2016 'Aquaman' Rebirth run is another cool stop if you like archaeological dives into Atlantean history and worldbuilding.
If you’re building a reading order, I usually tell folks: skim 'More Fun Comics' #73 for origins, sample the Silver/Bronze Age 'Adventure Comics'/Aquaman stories for classic flavor, read Peter David for political depth, then jump into 'Brightest Day' and Geoff Johns’ 'Aquaman' (New 52) and 'Throne of Atlantis' for the modern lore most adaptations pull from. I love revisiting the differences between those eras — it’s like finding new tide pools every time I re-read them.