Ohio to Indiana

Distance from Dayton to Indianapolis

Straight-line distance

103.3mi

Dayton, OH and Indianapolis, IN are 103.3 miles (166.3 km) apart in a straight line. From Dayton, the shortest path starts out heading W (270°).

kilometers
166.3
nautical miles
89.8
heading from Dayton
270° W
heading from Indianapolis
89° E
DaytonIndianapolis

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

How far Dayton is from Indianapolis

The great-circle distance between the Census internal points of Dayton and Indianapolis is 103.3 miles, 166.3 km or 89.8 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 103.3 miles, practically the same at this range.

Measurements

Miles
103.3
Kilometers
166.3
Nautical miles
89.8
Bearing from Dayton
270.3° W
Bearing arriving at Indianapolis
269.1°
Bearing from Indianapolis
89.1° E

Halfway between Dayton and Indianapolis

The great-circle midpoint is at 39.784764, -85.172807 (39°47'5.15"N 85°10'22.10"W). The nearest incorporated place of 1,000 or more people is Cambridge City, IN, with 1,736 residents, 1.9 miles from the midpoint. To find towns near the midpoint of any two places, use the halfway tool.

Time zones and daylight

Dayton uses America/New_York and Indianapolis uses America/Indiana/Indianapolis; Indianapolis is the same clock time all year. On June 21, Dayton gets 15 h 00 min of daylight and Indianapolis 15 h 00 min; on December 21, 9 h 21 min and 9 h 21 min. The two sit at nearly the same latitude, so their day lengths match closely all year.

Population compared

Indianapolis has 6.5 times the population of Dayton. From July 2020 to July 2024, Dayton changed by -0.9% and Indianapolis by +0.5%. The trip crosses from Ohio into Indiana.

  1. 01Dayton, OH136,346 (-0.9%)
  2. 02Indianapolis, IN891,484 (+0.5%)
July 1, 2024 population and change since July 2020, Census Vintage 2024.

Questions people ask

How far is Dayton from Indianapolis?

103.3 miles, 166.3 km or 89.8 nautical miles along the great circle between the two Census internal points. Road distance is longer.

Which direction is Indianapolis from Dayton?

W. The great-circle path leaves Dayton on a bearing of 270.3° and arrives at Indianapolis on 269.1°. The return trip starts on 89.1°.

What is halfway between Dayton and Indianapolis?

The midpoint is at 39.784764, -85.172807. The nearest incorporated place of 1,000+ is Cambridge City, IN, 1.9 miles from it.

Is there a time difference between Dayton and Indianapolis?

Dayton uses America/New_York and Indianapolis uses America/Indiana/Indianapolis; Indianapolis is the same clock time all year.

Which is bigger, Dayton or Indianapolis?

Indianapolis, with 891,484 residents in July 2024 against 136,346 for Dayton, 6.5 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.