This study examines the spatial distribution of manufacturing activities in Korea to introduce spatial distributional aspects to industry classifications. One hundred and sixty two administrative units in mainland Korea with 180 manufacturing sectors were analysed for this purpose. In the main analysis, the spatial distribution and association of individual sectors are examined using concentration and agglomeration measures, and 180 sectors are then classified along with the values of these measures. The classification is conducted using factor analysis for identifying groups of industries with a common spatial distribution pattern. The analysis identifies five major industry groups in terms of their spatial distribution patterns.