|• Total||0.54 sq mi (1.40 km2)|
|• Land||0.54 sq mi (1.40 km2)|
|• Water||0 sq mi (0 km2)|
|Elevation||820 ft (250 m)|
|• Estimate (2012)||986|
|• Density||1,824.1/sq mi (704.3/km2)|
|Time zone||EST (UTC-5)|
|• Summer (DST)||EST (UTC-5)|
|GNIS feature ID||0437497|
Ladoga was platted in 1836 by John Meyers. Meyers invited his friends to help him find a name. He required that the name not end in -burg or -ville and that it would not be named after another town. He chose Ladoga after finding Lake Ladoga on a map of Russia. 
In 1840 there were fifteen buildings in Ladoga, including two large stores selling general merchandise. One owned by Taylor Webster and one owned by William Nofsinger. By 1848, there were thirty families living in the town.
The Haw Creek Academy was built two miles south of Ladoga in 1838 by the Christian Church. In 1855, the Ladoga Female Seminary was established by the Baptist Church which quickly decided to allow male students, and shortly after the Ladoga Male Academy was established which soon allowed female students. (Both decided to let in the other gender because of financial concerns.)
Central Normal College was founded in Ladoga in 1876; it moved to Danville in 1878. The original building still stands in Ladoga.
The town of Ladoga lays claim to the Chicago World's Fair Ferris wheel. Designed by Pittsburgh, Pennsylvania bridge-builder, George Ferris, Luther V. Rice of Ladoga agreed to build it. After the Chicago World's Fair it was placed in Ferris Wheel Park for a while, then moved to St. Louis for its World's Fair.
Ladoga is located at (39.915223, -86.799271).
According to the 2010 census, Ladoga has a total area of 0.54 square miles (1.40 km2), all land.
As of the census of 2010, there were 985 people, 377 households, and 269 families residing in the town. The population density was 1,824.1 inhabitants per square mile (704.3/km2). There were 449 housing units at an average density of 831.5 per square mile (321.0/km2). The racial makeup of the town was 98.4% White, 0.1% African American, 0.3% Asian, 0.3% from other races, and 0.9% from two or more races. Hispanic or Latino of any race were 1.0% of the population.
There were 377 households of which 38.5% had children under the age of 18 living with them, 53.8% were married couples living together, 11.7% had a female householder with no husband present, 5.8% had a male householder with no wife present, and 28.6% were non-families. 22.3% of all households were made up of individuals and 10.9% had someone living alone who was 65 years of age or older. The average household size was 2.61 and the average family size was 3.04.
The median age in the town was 36.1 years. 28.3% of residents were under the age of 18; 8.7% were between the ages of 18 and 24; 25% were from 25 to 44; 26.1% were from 45 to 64; and 11.9% were 65 years of age or older. The gender makeup of the town was 49.6% male and 50.4% female.
As of the census of 2000, there were 1,047 people, 385 households, and 286 families residing in the town. The population density was 2,085.4 people per square mile (808.5/km²). There were 421 housing units at an average density of 838.6 per square mile (325.1/km²). The racial makeup of the town was 98.57% White, 0.19% African American, 0.29% Asian, 0.29% Pacific Islander, 0.29% from other races, and 0.38% from two or more races. Hispanic or Latino of any race were 0.57% of the population.
There were 385 households out of which 37.9% had children under the age of 18 living with them, 57.9% were married couples living together, 9.9% had a female householder with no husband present, and 25.5% were non-families. 23.1% of all households were made up of individuals and 12.2% had someone living alone who was 65 years of age or older. The average household size was 2.57 and the average family size was 2.99.
In the town the population was spread out with 26.6% under the age of 18, 7.9% from 18 to 24, 26.9% from 25 to 44, 20.8% from 45 to 64, and 17.7% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 97.5 males. For every 100 females age 18 and over, there were 92.0 males.
The median income for a household in the town was $40,781, and the median income for a family was $43,917. Males had a median income of $31,100 versus $24,135 for females. The per capita income for the town was $16,163. About 6.4% of families and 7.7% of the population were below the poverty line, including 12.1% of those under age 18 and 8.7% of those age 65 or over.
- Gronert, Theodore G., Sugar Creek Saga: A History and Development of Montgomery County, Wabash College, 1958.
- "G001 - Geographic Identifiers - 2010 Census Summary File 1". United States Census Bureau. Retrieved 2015-07-17.
- "American FactFinder". United States Census Bureau. Retrieved 2012-12-11.
- "Population Estimates". United States Census Bureau. Retrieved 2013-06-25.
- "American FactFinder". United States Census Bureau. Retrieved 2008-01-31.
- "US Board on Geographic Names". United States Geological Survey. 2007-10-25. Retrieved 2008-01-31.
- History of Montgomery County, Indiana : with personal sketches of representative citizens. Indianapolis Ind.: A.W. Bowen & Co., 1913 - pg. 378 Cite error: Invalid
<ref>tag; name "HOMC" defined multiple times with different content (see the help page).
- Gronert: pg 121
- Gronert: pg 46
- History of Montgomery County, Indiana : with personal sketches of representative citizens. pg 506
- "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. 2011-02-12. Retrieved 2011-04-23.
- "Annual Estimates of the Resident Population for Incorporated Places: April 1, 2010 to July 1, 2014". Retrieved June 4, 2015.
- "Census of Population and Housing". Census.gov. Retrieved June 4, 2015.