The Lincoln County R-III School District is a school district in Missouri. Its headquarters are in Troy.
Mostly in Lincoln County, its boundary within that county includes Cave, Fountain N' Lakes, Hawk Point, Moscow Mills, Troy, and Truxton. The boundary extends to a portion of Montgomery County and a portion of Warren County.
In 2023, Toyota Motor Manufacturing Missouri gave grants totaling to 230 thousand dollars to Lincoln County R-III and Silex R-1 School District to fund educational programs.