Columnar (disambiguation)

Columnar (or epithelium) is a type of epithelial cell.

Columnar may also refer to:
 * Columnar cacti, a descriptive term for smaller cacti
 * Columnar database, a type of database which stores data tables by column rather than by row
 * Columnar disposition, a technique in encryption
 * Columnar jointing, a geological structure shaped as a regular array of polygonal prisms
 * Columnar basalt, a type of rock formed during the cooling of a thick lava flow
 * Columnar Peak, a subsidiary peak of Mount Garibaldi, British Columbia, Canada
 * Columnar phase, a class of floating crystals which can exist in a cylindrical shape
 * Columnar Valley, a valley in Victoria Land, eastern Antarctica