Seis (disambiguation)

Seis may refer to:
 * Seis, a type of Puerto Rican dance music
 * Seis am Schlern, a village in Tyrol, Italy
 * Seis, a locality in Lutzhorn, Germany

SEIS may refer to:
 * On-Line Encyclopedia of Integer Sequences
 * Seed Enterprise Investment Scheme
 * Seismic Experiment for Interior Structure, a scientific instrument on board the InSight Mars lander
 * SEIS (album), by Mon Laferte (2021); see Mon Laferte discography