Recorded lightning data is essential for electric power company to evaluate existing transmission network and to evaluate future transmission planning. The usage of lightning data evaluation result for Central Java province is presented in this paper. The recorded lightning data from lightning detection system is collected for 2018 period and evaluated to obtain related parameter such as peak current distribution curve and lightning density map. During 2018, about 91.09% of total lightning is negative polarity with most peak current ranged between 10 – 14.9 kA. Most lightning occurred in western region of Central Java province with maximum lightning density >9.28 lightning/km2/month. Lightning data evaluation result can be used to evaluate the overvoltage of the insulator string, to obtain critical tower of the existing transmission line and to evaluate future transmission line tower location as presented in this paper.