How far is Decatur, IL from Marion, IL?
The driving distance from Decatur, IL to Marion, IL is about 131.6 miles (211.8 km), with a travel time of about 03h 11m by car.
- The straight-line flight distance is about 99.9 miles (160.8 km).
- For a round trip, plan for roughly 06h 23m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM CDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
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 03h 11m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
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.
Township in Shelby County, Illinois
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny then Chance Showers And Thunderstorms
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Decatur and Marion.
Turn-by-Turn Driving Directions
Step-by-step road directions between Decatur and Marion.
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1
Start on East Wood Street
155 m · 23 sec · East Wood Street
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2
Turn left onto South Franklin Street
1982 ft · 45 sec · South Franklin Street
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3
Turn right onto West Eldorado Street
1.2 mi · 2 min · West Eldorado Street
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4
Turn slight right
3.3 mi · 5 min
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5
Continue on South Mount Zion Road
2.1 mi · 3 min · South Mount Zion Road
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6
Continue on North State Route 121
35.3 mi · 51 min · North State Route 121
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7
Continue on Dewitt Avenue
2 mi · 3 min · Dewitt Avenue
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8
Turn right onto North 19th Street
2731 ft · 60 sec · North 19th Street
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9
At the end of the road, turn left onto Charleston Avenue
117 m · 10 sec · Charleston Avenue
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10
Turn right onto Lakeland Boulevard
3.7 mi · 6 min · Lakeland Boulevard
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11
Take the ramp right toward I-57 South: Effingham
2021 ft · 49 sec
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12
Merge slight left
21.4 mi · 23 min
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13
Take the exit slight right toward US 45: Sigel, Effingham
1753 ft · 35 sec
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14
Turn left
1.9 mi · 3 min
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15
Turn left onto East Fayette Avenue
921 ft · 17 sec · East Fayette Avenue
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16
Turn right onto South Willow Street
2 mi · 3 min · South Willow Street
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17
Continue on County Road 1300
7.4 mi · 11 min · County Road 1300
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18
Continue on West Center Street
13.8 mi · 21 min · West Center Street
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19
Turn right onto South Van Buren Street
11 mi · 15 min · South Van Buren Street
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20
Continue on County Road 1100 East
6.7 mi · 9 min · County Road 1100 East
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21
Continue on North West Street
2.5 mi · 4 min · North West Street
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22
Continue on County Road 1150
12.3 mi · 17 min · County Road 1150
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23
Turn right onto 2050N
2.9 mi · 11 min · 2050N
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24
Arrive at your destination
0 m · 1 sec · 2050N
Car Route Details
A richer read on the saved driving route between Decatur and Marion.
Straightforward drive
The saved road route has a manageable number of maneuvers and should be easy to follow with normal attention to signs.
North State Route 121
Continue on North State Route 121
35.3 mi · 00h 51m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Mostly Sunny then Chance Showers And Thunderstorms leaving Decatur and Mostly Sunny near Marion.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Decatur to Marion?
The road trip is about 131.6 miles (211.8 km) and usually takes 03h 11m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Sigel is a useful midpoint, sitting about 65.8 miles from Decatur and 65.8 miles from Marion.
How much longer is the road route than the straight-line distance?
The direct path is about 99.9 miles (160.8 km), while the road route adds roughly 31.7 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 6:00 AM to 8:00 AM CDT. If you want a more comfortable same-day return, try to leave by 10:36 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $17.50 one way or $34.99 round trip. Estimated CO2 is about 41.2 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny then Chance Showers And Thunderstorms around Decatur and Mostly Sunny near Marion.
Stop Ideas Near Sigel
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Sigel.
Effingham
Mattoon station
Centralia station
Illinois Terminal
Flight Path Map
This map shows the direct air route between Decatur and Marion. Straight-line distance: 99.94 mi (160.84 km).
#1 Decatur
The most populous city in Macon County, Illinois.
| Population | 70,007 |
| Coordinates | 39.8403100, -88.9548000 |
| Altitude | 205 |
| Country | United States |
#2 Marion
City in and the county seat of Williamson County, Illinois, United States
| Population | 17,417 |
| Coordinates | 38.5511600, -88.1083700 |
| Altitude | 127 |
| Country | United States |
End: Marion (-88.10837, 38.55116)
Estimated Travel Time
Distance: 212 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 04h 23m |
| 40 mph (64.37 km/h) | 03h 17m |
| 50 mph (80.47 km/h) | 02h 37m |
| 60 mph (96.56 km/h) | 02h 11m |
| 70 mph (112.65 km/h) | 01h 52m |
| 80 mph (129 km/h) | 01h 38m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $17.50 | $34.99 |
| Mid-grade | $4.25 | $19.73 | $39.47 |
| Premium | $4.65 | $21.59 | $43.19 |
| Diesel | $5.30 | $24.61 | $49.22 |
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 Illinois · Jun 06, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.