During the Megacity Air Pollution Studies-Seoul (MAPS-Seoul) campaign from May to June 2015, aerosol optical properties in Korea were obtained based on the AERONET sunphotometer measurement at five sites (Anmyon, Gangneung_WNU, Gosan_SNU, Hankuk_UFS, and Yonsei_University). Using this dataset, we examine regional aerosol types applying a number of known aerosol classification methods. We totally utilize five different methods to categorize the regional aerosol types and evaluate results from each method through the inter-comparison. The difference and similarity among results are also discussed, contingent upon the usage of AERONET inversion products such as the single scattering albedo. Despite several small differences, all five methods suggest the general features of regional dominant aerosol types: dominance of fine-mode aerosols with highly radiative absorbing property at Hankuk_UFS, and Yonsei_University, large portion of non-absorbing fine mode particles at Gosan_SNU, some impacts of coarse mode particles at Anmyon. The analysis of 3-day back-trajectories is also performed to see the relationship of classified types at each site to the regional transport pattern. In particular, the spatiotemporally short-scale transport looks to have a large influence on the local aerosol properties. As a result, we find that the domestic emission in Korea much contributes to the high dominance of radiative absorbing aerosols at Seoul metropolitan area, and the air-mass transport from China largely affects to the western coastal sites, such as Anmyon and Gosan_SNU.