LZ4 may refer to:
Transportation LZ 4 (Luftschiff Zeppelin 4), a German experimental airship LZ4, a GM High Value engine SpaceX Landing Zone 4, located at SLC-4 West, at Vandenberg Air Force Base Space Launch Complex 4
Other uses LZ4 (compression algorithm), a lossless data compression algorithm 24944 Harish-Chandra, a main-belt asteroid formerly called 1997 LZ4 Led Zeppelin IV, an album by Led Zeppelin