The AN/ALQ-218 is an American airborne electronic warfare radar warning receiver (RWR) system, found on Grumman/Northrop Grumman EA-6B Prowler and Boeing EA-18G Growler aircraft.

The AN/ALQ-218 is an airborne passive Radar warning receiver / electronic warfare support measures / electronic signals intelligence (RWR/ESM/ELINT) sensor system designed for airborne situational awareness and signal intelligence gathering.

[2] The ALQ-218 is mainly featured aboard the U.S. Navy's Boeing EA-18G Growler aircraft,[3][4] which has replaced the EA-6B Prowler in the U.S.

[5] The ALQ-218 was previously on the Grumman EA-6B Prowler, which the Improved Capability III ALQ-218 was modified and integrated into the EA-18G's Airborne Electronic Attack (AEA) system.

[6] Avionics from the EA-6B were modified to fit into the gun bay and wing tip pods of the Growler.