How far is Marietta, GA from DeKalb County, GA?
The driving distance from Marietta, GA to DeKalb County, GA is about 30.4 miles (49 km), with a travel time of about 00h 42m by car.
- The straight-line flight distance is about 22.4 miles (36 km).
- For a round trip, plan for roughly 01h 24m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 7:00 AM to 7:00 PM EDT.
Reverse, save, or send this route
This is an easy same-day return drive. Copy the route link, send it to another device, or print a clean version before you head out.
This is an easy same-day return drive.
Flight Distance
Driving Distance
Gas Cost Calculator
Leave and Arrive Planner
Pick a departure time to see your estimated arrival and same-day return window.
Drive time stays fixed at 00h 42m.
This is a short drive, so your comfort window is wide. Traffic and current weather matter more than the clock.
You are leaving earlier than the recommended window, which gives you extra margin for breaks and traffic.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
Town in DeKalb County, Georgia, USA
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Driving Route Map
The map below follows the saved road route between Marietta and DeKalb County.
Turn-by-Turn Driving Directions
Step-by-step road directions between Marietta and DeKalb County.
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1
Start on West Park Square
36 m · 11 sec · West Park Square
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2
Continue on South Park Square
105 m · 9 sec · South Park Square
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3
Continue on Roswell Street
1.7 mi · 4 min · Roswell Street
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4
Turn right onto Cobb Parkway South
1.1 km · 1 min · Cobb Parkway South
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5
Turn left onto South Marietta Parkway
1 km · 1 min · South Marietta Parkway
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6
Take the exit slight right toward I 75 South: Atlanta
2479 ft · 53 sec
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7
Merge slight left onto Larry McDonald Memorial Highway
3.2 mi · 4 min · Larry McDonald Memorial Highway
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8
Take the exit slight right toward I 285 Bypass West, I 285 Bypass East: Birmingham, Tampa, Greenville, Augusta
2272 ft · 32 sec
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9
Keep slight right to continue on I 285 East Bypass: Greenville, Augusta
1.4 km · 1 min
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10
Merge slight left onto Atlanta Bypass / The Perimeter
20.3 mi · 24 min · Atlanta Bypass / The Perimeter
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11
Take the exit slight right toward GA 10: Memorial Drive, Avondale Estates
2840 ft · 1 min
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12
Turn right onto Memorial Drive
743 ft · 24 sec · Memorial Drive
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13
Turn left onto Camp Road
748 ft · 24 sec · Camp Road
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14
Continue on Camp Road
1870 ft · 1 min · Camp Road
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15
Turn left onto Kensington Road
1517 ft · 45 sec · Kensington Road
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16
Turn left onto Durham Park Road
3221 ft · 1 min · Durham Park Road
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17
Arrive at your destination
0 m · 1 sec · Durham Park Road
Car Route Details
A richer read on the saved driving route between Marietta and DeKalb County.
Turn-heavy local drive
The route has frequent decision points for its length, so lane choice and turn timing will matter more than cruising speed.
Atlanta Bypass / The Perimeter
Merge slight left onto Atlanta Bypass / The Perimeter
20.3 mi · 00h 24m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A short regional drive
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
Clear leaving Marietta and Sunny near DeKalb County.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Marietta to DeKalb County?
The road trip is about 30.4 miles (49 km) and usually takes 00h 42m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
What is the halfway point on this route?
Dunwoody is a useful midpoint, sitting about 15.2 miles from Marietta and 15.2 miles from DeKalb County.
How much longer is the road route than the straight-line distance?
The direct path is about 22.4 miles (36 km), while the road route adds roughly 8 extra miles because roads do not follow the straight air line.
When is the best time to leave for this route?
A good departure window is usually 7:00 AM to 7:00 PM EDT. If you want a more comfortable same-day return, try to leave by 7:06 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $4.11 one way or $8.22 round trip. Estimated CO2 is about 9.6 kg one way.
What should you check before leaving?
Before you leave, expect Clear around Marietta and Sunny near DeKalb County.
Stop Ideas Near Dunwoody
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Cafe 55
Atlanta City Hall
Atlanta Revenue Bureau
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Dunwoody.
Peachtree Station
Gainesville
Toccoa
Flight Path Map
This map shows the direct air route between Marietta and DeKalb County. Straight-line distance: 22.38 mi (36.02 km).
#1 Marietta
The most populous city in Cobb County, Georgia.
| Population | 60,786 |
| Coordinates | 33.9526000, -84.5499300 |
| Altitude | 344 |
| Country | United States |
#2 DeKalb County
County in Georgia, United States
| Population | 762,009 |
| Coordinates | 33.7715300, -84.2264100 |
| Altitude | 277 |
| Country | United States |
End: DeKalb County (-84.22641, 33.77153)
Estimated Travel Time
Distance: 49 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 00m |
| 40 mph (64.37 km/h) | 00h 45m |
| 50 mph (80.47 km/h) | 00h 36m |
| 60 mph (96.56 km/h) | 00h 30m |
| 70 mph (112.65 km/h) | 00h 26m |
| 80 mph (129 km/h) | 00h 22m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.81 | $4.11 | $8.22 |
| Mid-grade | $4.26 | $4.61 | $9.21 |
| Premium | $4.69 | $5.06 | $10.12 |
| Diesel | $5.73 | $6.18 | $12.37 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
Prices in Georgia · Oct 13, 2026