This is a list of mollusks observed in the U.S. state of Utah.
Gastrocopta is a genus of minute air-breathing land snails, terrestrial pulmonate gastropod mollusks or micromollusks in the family Gastrocoptidae.
Stagnicola is a genus of air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Lymnaeidae, the pond snails.
Stagnicola utahensis, common name the thickshell pondsnail, is a species of air-breathing freshwater snail, an aquatic pulmonate gastropod mollusk in the family Lymnaeidae, the pond snails. This species is endemic to Utah Lake in the United States. The last living snails were found in the 1930s.
Gastrocopta pellucida is a species of minute air-breathing land snail, a terrestrial pulmonate gastropod mollusk or micromollusk in the family Vertiginidae, the vertigo snails.
Hawaiia minuscula, common name the minute gem or minute gem snail, is a species of very small air-breathing land snail, a terrestrial pulmonate gastropod mollusk or micromollusk in the family Pristilomatidae.