Sarah Helmick State Recreation Site is a state park located south of Monmouth, in Polk County, Oregon, United States. It is located on the floodplain of the Luckiamute River and is forested by Bigleaf Maple, Douglas-fir, and Black Cottonwood trees, among other varieties. The park is named for Sarah Helmick, a pioneer to Oregon in 1845 who donated the original land.