Artesia Geyser is a geyser in the Lower Geyser Basin of Yellowstone National Park in the United States. Artesia Geyser is part of the Black Warrior Group which includes Young Hopeful Geyser, Gray Bulger Geyser, and Steady Geyser.
Artesia is a perpetual geyser that is never stops ejecting water from at least one of its two cones, usually no more than 5 ft (1.5 m). One vent is angeled toward the boardwalk that passes the geyser and the other is angled toward the Firehole River.
During a period in 1999, one of the cones jetted to a distance of 12 ft (3.7 m) while the other emitted only steam.