CH4 (disambiguation)

CH4 most commonly refers to the chemical formula for methane.

CH4 may also denote:
 * a postcode subdistrict of Chester, United Kingdom
 * the CH-4 variant of the Cessna CH-1 Skyhook helicopter
 * the CH-4 variant of the CASC Rainbow unmanned aerial vehicle
 * CH-4, a submarine chaser during World War II
 * Channel 4 (disambiguation)
 * Church Hymnary 4th edition
 * Chandrayaan-4 (CH-4), Moon lander