State Route 70 (SR 70) is a state highway that runs south-to-north through portions of Coweta and Fulton counties in north-central Georgia. The route runs from its southern terminus at US 27, SR 16, and SR 34 in Newnan to its northern terminus at US 78, US 278, and SR 8 in northwest Atlanta (Bankhead).

Upon reaching the southwestern portion of Atlanta, in unincorporated Fulton County, SR 70 turns into Leroy Johnson-Fulton Industrial Boulevard (between I-20 and Donald Lee Hollowell Parkway/US 78). At this point it is very heavily traveled, widening to a six-lane parkway. The state highway passes by Fulton County Airport at Charlie Brown Field.

Once SR 70 reaches Campbellton Road (SR 154/166), it merges with the above-mentioned roadway. The state highway follows Campbellton Road to the intersection of Fairburn Road (SR 92), where SR 70/154/166 merge with SR 92 south. SR 70/154 split from SR 92 at Cascade-Palmetto Highway, continuing south to South Fulton Parkway, where SR 70 splits from SR 154 and turns west onto the parkway en route to its original routing at Campbellton-Redwine Road. Just before the Douglas County line where South Fulton parkway turns into Capps Ferry Road, going southbound, SR 70 will turn left onto Campbellton-Redwine Rd where it continues its original routing for 4.2 miles (6.8 km) in which it goes into Coweta County. In Coweta County it changes names to Roscoe Rd, then almost immediately SR 70/Roscoe Rd goes through 2 sharp(70 degree) curves, one to the right then one immediately back to the left, assuming we are traveling southbound. After approxamently 1/4 mile, SR 70/Roscoe Rd will proceed with an extremely sharp(90 degree) curve to the right then immediately with one back to the left. It travels for approx. 8.5 miles (13.7 km) in Coweta County before coming to the intersection of State Route 34 Bypass where SR 70 will terminate.

The re-routing of SR 70 westward along Campbellton Road crossing the Chattahoochee River now takes the route into Douglas County before turning south and back across the Chattahoochee River and returning to southern Fulton County. The stretch of Fulton Industrial Boulevard between Campbellton Road and Fairburn Road is no longer assigned a State routing number. This four mile stretch was formerly SR 70 and SR 154. The stretch of Fairburn Road from Campbellton Road to SR 166 in southeast Douglas County now carries the unusual distinction of being assigned 4 state route numbers. This stretch is now SR 70/92/154/166.