State Route 205 (SR 205) is a 15.185-mile-long (24.438 km) state highway that serves as a connection between the towns of Guntersville in Marshall County and Boaz in Etowah County.

The highway serves as an alternate to U.S. Route 431 (US 431) through the area.

The southern terminus is at an intersection with US 431 in Sardis City.

[2] From this point, the highway travels in a northerly direction through Boaz and Albertville prior to turning to the northwest en route to its northern terminus at another intersection with US 431 near Guntersville.

In 2006, the portion of SR 205 in Etowah County is called The Jack Toney Memorial Highway.