Review aggregator Rotten Tomatoes reported an approval rating of 100% based on 17 reviews, with an average rating of 7.96/10 for the miniseries. The website's critical consensus reads, "A rare and expansive look into the consequences of unfettered power, Immigration Nation is a powerful, harrowing indictment of the current state of American immigration." Metacritic gave the miniseries a weighted average score of 86 out of 100 based on 11 reviews, indicating "universal acclaim".

Daniel Fienberg of The Hollywood Reporter described the series as "Not an easy watch, but often essential" and wrote: "As in-depth and widely-encompassing as it is, Immigration Nation feels barely like the tip of a horrible iceberg." John Anderson of the Wall Street Journal, called the series: "a strictly observational series, so there are no explanatory titles or voiceovers. But the filmmakers do know how to juxtapose their material in ways that make unmistakable points." Caroline Framke at Variety gave a review stating that the series "provides a damning indictment of the labyrinth systems that make ICE so powerful, and a wrenching examination of the human cost its policies have wrought."

In an article published in The New York Times, on July 23, 2020, Caitlin Dickerson reports that Jenny L. Burke, the press secretary for ICE, stated that the agency is "shocked by the mischaracterizations made by the production company," and "wholeheartedly disputes the allegations brought forward by filmmakers of this production."

• Immigration Nation on Netflix
• Immigration Nation at IMDb