Iowa to Illinois

Distance from Cedar Rapids to Rockford

Straight-line distance

135.6mi

Cedar Rapids, IA and Rockford, IL are 135.6 miles (218.2 km) apart in a straight line. From Cedar Rapids, the shortest path starts out heading E (80°).

kilometers
218.2
nautical miles
117.8
heading from Cedar Rapids
80° E
heading from Rockford
262° W
Cedar RapidsRockford

Orange line: great-circle path · ring: midpoint · thin lines: county borders

How far Cedar Rapids is from Rockford

The great-circle distance between the Census internal points of Cedar Rapids and Rockford is 135.6 miles, 218.2 km or 117.8 nautical miles. That is the shortest path over the Earth's surface, computed with the haversine formula on a sphere with the mean Earth radius, 6,371.0 km. A course held on one compass bearing (a rhumb line) would be 135.6 miles, practically the same at this range.

Measurements

Miles
135.6
Kilometers
218.2
Nautical miles
117.8
Bearing from Cedar Rapids
80.5° E
Bearing arriving at Rockford
82.2°
Bearing from Rockford
262.2° W

Halfway between Cedar Rapids and Rockford

The great-circle midpoint is at 42.119176, -90.374395 (42°07'9.03"N 90°22'27.82"W). The nearest incorporated place of 1,000 or more people is Bellevue, IA, with 2,321 residents, 10.1 miles from the midpoint. To find towns near the midpoint of any two places, use the halfway tool.

Time zones and daylight

Both use America/Chicago, so there is no time difference. On June 21, Cedar Rapids gets 15 h 14 min of daylight and Rockford 15 h 16 min; on December 21, 9 h 07 min and 9 h 05 min. The two sit at nearly the same latitude, so their day lengths match closely all year.

Population compared

Rockford has 1.1 times the population of Cedar Rapids. From July 2020 to July 2024, Cedar Rapids changed by +0.0% and Rockford by -0.8%. The trip crosses from Iowa into Illinois.

  1. 01Cedar Rapids, IA137,904 (+0.0%)
  2. 02Rockford, IL147,486 (-0.8%)
July 1, 2024 population and change since July 2020, Census Vintage 2024.

Questions people ask

How far is Cedar Rapids from Rockford?

135.6 miles, 218.2 km or 117.8 nautical miles along the great circle between the two Census internal points. Road distance is longer.

Which direction is Rockford from Cedar Rapids?

E. The great-circle path leaves Cedar Rapids on a bearing of 80.5° and arrives at Rockford on 82.2°. The return trip starts on 262.2°.

What is halfway between Cedar Rapids and Rockford?

The midpoint is at 42.119176, -90.374395. The nearest incorporated place of 1,000+ is Bellevue, IA, 10.1 miles from it.

Is there a time difference between Cedar Rapids and Rockford?

Both use America/Chicago, so there is no time difference.

Which is bigger, Cedar Rapids or Rockford?

Rockford, with 147,486 residents in July 2024 against 137,904 for Cedar Rapids, 1.1 times as many.

Sources and data as of

Data as of: Census 2024 Gazetteer internal points and Vintage 2024 estimates; time zones from Open-Meteo.

  1. 01Census 2024 Gazetteer, places
  2. 02Census Vintage 2024 subcounty population estimates
  3. 03SunCalc library (Vladimir Agafonkin), algorithms after Jean Meeus
  4. 04IANA time zone database (clock times and daylight saving rules)

How every number is computed: methodology. Spotted a wrong figure? Report an error.