How far is Sioux City, IA from Marengo, IA?
The driving distance from Sioux City, IA to Marengo, IA is about 265.1 miles (426.6 km), with a travel time of about 05h 21m by car.
- The straight-line flight distance is about 227 miles (365.3 km).
- For a round trip, plan for roughly 10h 42m 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 05h 21m.
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.
City in Iowa
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 Sioux City and Marengo.
Turn-by-Turn Driving Directions
Step-by-step road directions between Sioux City and Marengo.
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1
Start on the route
35 m · 14 sec
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2
Turn left onto 9th Street
990 ft · 46 sec · 9th Street
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3
Turn right onto Court Street
767 ft · 27 sec · Court Street
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4
Turn left onto 7th Street
122 m · 19 sec · 7th Street
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5
Turn right onto Iowa Street
129 m · 24 sec · Iowa Street
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6
Turn left onto 6th Street
1.4 km · 2 min · 6th Street
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7
Continue on Fairmount Street
3030 ft · 1 min · Fairmount Street
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8
Turn left onto Gordon Drive
3.4 mi · 7 min · Gordon Drive
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9
Continue on Highway 20
39.4 mi · 47 min · Highway 20
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10
Continue on United States Highway 20
8.3 mi · 10 min · United States Highway 20
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11
Continue on 220th Street
93.4 mi · 1 hr 48 min · 220th Street
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12
Take the exit slight right toward I 35 South: Des Moines
1.1 km · 1 min
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13
Merge slight left
30.4 mi · 33 min
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14
Take the exit slight right toward US 30 East: Nevada
1254 ft · 43 sec
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15
Merge slight left
66.3 mi · 1 hr 17 min
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16
Take the exit slight right
1863 ft · 52 sec
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17
Turn right
5.2 mi · 8 min
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18
Turn right onto 7th Avenue
1.3 km · 1 min · 7th Avenue
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19
Continue on 11th Avenue
1.5 mi · 2 min · 11th Avenue
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20
Continue on State Highway 21
1.1 mi · 2 min · State Highway 21
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21
Keep slight left
11.7 mi · 17 min
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22
Turn left onto Western Avenue
88 m · 15 sec · Western Avenue
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23
Turn right onto West Marion Street
951 ft · 47 sec · West Marion Street
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24
Turn left
41 m · 10 sec
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25
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Sioux City and Marengo.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
220th Street
Continue on 220th Street
93.4 mi · 01h 48m
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.
Sunny leaving Sioux City and Sunny near Marengo.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Sioux City to Marengo?
The road trip is about 265.1 miles (426.6 km) and usually takes 05h 21m 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?
Webster City is a useful midpoint, sitting about 132.3 miles from Sioux City and 132.8 miles from Marengo.
How much longer is the road route than the straight-line distance?
The direct path is about 227 miles (365.3 km), while the road route adds roughly 38.1 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 6:18 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $35.26 one way or $70.52 round trip. Estimated CO2 is about 83.1 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Sioux City and Sunny near Marengo.
Flight Path Map
This map shows the direct air route between Sioux City and Marengo. Straight-line distance: 227 mi (365.32 km).
#1 Sioux City
The second most populous city in Iowa.
| Population | 82,651 |
| Coordinates | 42.4999900, -96.4003100 |
| Altitude | 366 |
| Country | United States |
#2 Marengo
Town and county of Iowa County, Iowa, United States
| Population | 2,466 |
| Coordinates | 41.7980600, -92.0707400 |
| Altitude | 225 |
| Country | United States |
End: Marengo (-92.07074, 41.79806)
Estimated Travel Time
Distance: 427 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 08h 49m |
| 40 mph (64.37 km/h) | 06h 37m |
| 50 mph (80.47 km/h) | 05h 18m |
| 60 mph (96.56 km/h) | 04h 25m |
| 70 mph (112.65 km/h) | 03h 47m |
| 80 mph (129 km/h) | 03h 18m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $35.26 | $70.52 |
| Mid-grade | $4.25 | $39.77 | $79.53 |
| Premium | $4.65 | $43.51 | $87.03 |
| Diesel | $5.30 | $49.59 | $99.18 |
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 Iowa · Apr 19, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.