How far is Marengo, IL from Rockford, IL?
The driving distance from Marengo, IL to Rockford, IL is about 30.8 miles (49.6 km), with a travel time of about 00h 39m by car.
- The straight-line flight distance is about 24.9 miles (40 km).
- For a round trip, plan for roughly 01h 18m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 7:00 AM to 7:00 PM CDT.
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 39m.
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.
City in Illinois
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 Marengo and Rockford.
Turn-by-Turn Driving Directions
Step-by-step road directions between Marengo and Rockford.
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1
Start on South State Street
33 m · 7 sec · South State Street
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2
Turn right onto West Grant Highway
5 mi · 7 min · West Grant Highway
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3
Continue on U.S. Grant Memorial Highway
13.5 mi · 20 min · U.S. Grant Memorial Highway
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4
Continue on U.S. Grant Memorial Highway
569 ft · 10 sec · U.S. Grant Memorial Highway
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5
Continue on Harrison Avenue
1.2 km · 1 min · Harrison Avenue
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6
Turn right onto South Perryville Road
859 ft · 25 sec · South Perryville Road
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7
Turn left onto Charles Street
2.7 mi · 5 min · Charles Street
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8
Turn right onto South Alpine Road
1.4 km · 2 min · South Alpine Road
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9
Turn left onto East State Street
2.7 mi · 4 min · East State Street
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10
Turn right onto East Jefferson Street
1.2 km · 2 min · East Jefferson Street
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11
Turn left onto North Wyman Street
793 ft · 24 sec · North Wyman Street
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12
Turn right onto West State Street
23 m · 2 sec · West State Street
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13
Arrive at your destination
0 m · 1 sec · West State Street
Car Route Details
A richer read on the saved driving route between Marengo and Rockford.
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.
U.S. Grant Memorial Highway
Continue on U.S. Grant Memorial Highway
13.5 mi · 00h 20m
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.
Sunny leaving Marengo and Sunny near Rockford.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Marengo to Rockford?
The road trip is about 30.8 miles (49.6 km) and usually takes 00h 39m 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?
Belvidere is a useful midpoint, sitting about 13.2 miles from Marengo and 17.6 miles from Rockford.
How much longer is the road route than the straight-line distance?
The direct path is about 24.9 miles (40 km), while the road route adds roughly 5.9 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 CDT. If you want a more comfortable same-day return, try to leave by 7:12 PM CDT.
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 9.7 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Marengo and Sunny near Rockford.
Stop Ideas Near Belvidere
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 Belvidere.
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Flight Path Map
This map shows the direct air route between Marengo and Rockford. Straight-line distance: 24.88 mi (40.04 km).
#1 Marengo
City in McHenry County, Illinois, United States
| Population | 7,377 |
| Coordinates | 42.2486300, -88.6084300 |
| Altitude | 254 |
| Country | United States |
#2 Rockford
The second most populous city in Illinois.
| Population | 144,835 |
| Coordinates | 42.2711300, -89.0940000 |
| Altitude | 218 |
| Country | United States |
End: West State Street (-89.094046, 42.271066)
Estimated Travel Time
Distance: 50 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 01m |
| 40 mph (64.37 km/h) | 00h 46m |
| 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 23m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $4.11 | $8.22 |
| Mid-grade | $4.25 | $4.64 | $9.27 |
| Premium | $4.65 | $5.07 | $10.15 |
| Diesel | $5.30 | $5.78 | $11.56 |
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 · Apr 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.