The expressways in South Korea has been used since 50 years ago. However, there was no research has been conducted on the expressway’s own major facilities. So, writer analyzed the distribution and name characteristics of the service area (SA) after the same research of the expressway junction. The analysis results of 231 SAs’ distibution are as follows. Both simple total number of SAs for each route and the number of SAs per unit distance were high for the main trunk lines. By region, the number of SAs was higher in provincial areas than in metropolitan areas and nearby areas, and it showed a characteristic of scattering unlike junctions. The number of SAs per area is high along the Gyeongbu axis, and the number of SAs per population is high in the provincial areas. The analysis results of 136 SAs’ name are as follows. In word type analysis, ‘Sino-Korea’ word was 89.7%. In syllable analysis, mean number of syllable was 2.75 and syllable of SA names has exponential distribution. In name source analysis, SA name related to administrative district name was outstanding with 66.9% and combined name of SA was followed by 19.1%. Many of recently established or changed names of SAs are combined names, so it is important to minimize discomfort for users.