South Carolina Highway 909 (SC 909) is a 14.060-mile (22.627 km) primary state highway in the U.S. state of South Carolina.

It connects the communities of northern Chester County.

The route zig-zags in northern Chester County connecting small communities, and provides access to the Chester Catawba Regional Airport.

[2][3] Established in 1940 as a new primary routing, it originally traversed from SC 9 to US 21 in Lewis.

In 1948, SC 909 was reverted to its original 1940 with both extensions becoming secondary roads.