A study was performed to better understand the taxonomy and diversity of the diatom genus Amphora (Bacillariophyceae) from Korean coastal environments. Samples were taken from six locations at Saemangeum tidal flats on the west coast of Korea. Light microscopic (LM) and scanning electron microscopic (SEM) observations revealed a total of 23 Amphora species. Thirteen were identified to the species level, and ten to the genus level. Three Amphora species viz. A. arenicola, A. beaufortiana and A. maletractata var. constricta were recorded for the first time in Korea. All the Amphora species were listed and presented with morphological descriptions, dimensional information and photographic information.