Insomniac is the fourth studio album from the punk rock band Green Day. It was released in 1995 on the Reprise Records label. Though it reached #2 in the U.S. and went 2x Platinum, Insomniac didn't have the sales endurance of its predecessor, Dookie, largely due to its slightly darker lyrical tone and more abrasive sound. Though many consider Insomniac to be more consistent than Dookie, it did not feature a well-known hit single akin to "Longview" or "Basket Case", although the combined single "Brain Stew/Jaded" did reach number 3 in the U.S. Modern Rock Track charts, and the single "Geek Stink Breath" reached number 16 in the U.K singles chart.
Insomniac has sold 2 million units in the United States and 7 million units worldwide as of August 2006. It is Green Day's third most successful album after Dookie and American Idiot.