Wanghŭngsa (Korean: 왕흥사; Hanja: 王興寺; RR: Wangheungsa) was a Baekje-era Buddhist temple in what is now Buyeo County, South Chungcheong Province, South Korea.

[1] It was founded in the year 577 (Korean calendar) during the reign of King Wideok.

After Baekje fell in 660, a small holdout group of Baekje soldiers fought from the temple and were all killed.

A roof tile with the name of the temple was discovered at the site.

It was made a Monument of South Chungcheong Province in 1982, and then upgraded to the national-level designation of Historic Site of South Korea in 2001.