Review aggregator website Metacritic gives The Civil War a score of 77 out of 100 based on 22 critics, indicating "generally favorable reviews".[1]
Heather Phares of AllMusic gave the album 4.5 stars out of 5, calling it "an album whose subtly oxymoronic title suggests the inherent contradictions of its sound."[2] Mark Richardson of Pitchfork gave the album a 7.3 out of 10, saying, "As a technical achievement and as a piece of pure sound, The Civil War is inarguably Matmos' best record."[5]