음성 망이산성은 1980년도 단국대학교 학술조사단에 의하여 발굴된 것으로 삼국시대에 축성된 것으로 보인다.
Eumseong Mangisanseong fortress was discovered by Dankook University's academic research team in 1980 and appears to have been built during the Three Kingdoms period.