|City of Bluffton, Indiana|
|— City —|
|National Register of Historic Places|
|Motto: "The Parlor City"|
|• Mayor||Ted L. Ellis (D)|
|• Total||8.36 sq mi (21.65 km2)|
|• Land||8.23 sq mi (21.32 km2)|
|• Water||0.13 sq mi (0.34 km2)|
|Elevation||813 ft (252 m)|
|• Estimate (2011)||9,929|
|• Density||1,202.6/sq mi (464.3/km2)|
|Time zone||EST (UTC-5)|
|• Summer (DST)||EDT (UTC-4)|
|GNIS feature ID||0431264|
Bluffton is located at .(40.737991, -85.172223)
According to the 2010 census, the city has a total area of 8.36 square miles (21.7 km2), of which 8.23 square miles (21.3 km2) (or 98.44%) is land and 0.13 square miles (0.34 km2) (or 1.55%) is water.
2010 census 
As of the census of 2010, there were 9,897 people, 4,112 households, and 2,585 families residing in the city. The population density was 1,202.6 inhabitants per square mile (464.3 /km2). There were 4,532 housing units at an average density of 550.7 per square mile (212.6 /km2). The racial makeup of the city was 96.0% White, 0.7% African American, 0.4% Native American, 0.5% Asian, 1.3% from other races, and 1.1% from two or more races. Hispanic or Latino of any race were 3.3% of the population.
There were 4,112 households out of which 31.3% had children under the age of 18 living with them, 46.9% were married couples living together, 11.3% had a female householder with no husband present, 4.7% had a male householder with no wife present, and 37.1% were non-families. 32.4% of all households were made up of individuals and 13.4% had someone living alone who was 65 years of age or older. The average household size was 2.34 and the average family size was 2.93.
The median age in the city was 38.3 years. 24.6% of residents were under the age of 18; 8.8% were between the ages of 18 and 24; 24.3% were from 25 to 44; 25.3% were from 45 to 64; and 16.9% were 65 years of age or older. The gender makeup of the city was 48.0% male and 52.0% female.
2000 census 
As of the census of 2000, there were 9,536 people, 3,922 households, and 2,517 families residing in the city. The population density was 1,442.7 people per square mile (557.0/km²). There were 4,197 housing units at an average density of 635.0 per square mile (245.2/km²). The racial makeup of the city was 97.65% White, 0.34% African American, 0.22% Native American, 0.24% Asian, 0.07% Pacific Islander, 0.79% from other races, and 0.69% from two or more races. Hispanic or Latino of any race were 2.35% of the population.
There were 3,922 households out of which 30.4% had children under the age of 18 living with them, 50.2% were married couples living together, 10.7% had a female householder with no husband present, and 35.8% were non-families. 31.4% of all households were made up of individuals and 13.4% had someone living alone who was 65 years of age or older. The average household size was 2.35 and the average family size was 2.96.
In the city the population was spread out with 25.0% under the age of 18, 9.6% from 18 to 24, 27.7% from 25 to 44, 20.6% from 45 to 64, and 17.2% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 90.1 males. For every 100 females age 18 and over, there were 86.4 males.
The median income for a household in the city was $37,416, and the median income for a family was $45,294. Males had a median income of $33,088 versus $22,018 for females. The per capita income for the city was $19,118. About 6.4% of families and 9.0% of the population were below the poverty line, including 12.8% of those under age 18 and 10.3% of those age 65 or over.
Bluffton is one of the first towns in Indiana, and across America, to both publicly acknowledge its history of exclusion and to promote itself as an inclusive town. In 2006, Bluffton was featured in USA Today as an inclusive town that was putting up welcoming, inclusive signs at all local schools as well as at the entrances of three state highways. Mayor Ted Ellis was noted in the article for his helping Bluffton become one of the first to join the National League of Cities' Partnership for Working Toward Inclusive Communities.
Notable natives and former residents 
- Adam Ballinger, basketball player and team captain of the Adelaide 36ers in the Australian NBL. Played high school ball at Bluffton High School.
- Don Lash, champion long-distance runner who won the 1938 James E. Sullivan Award as the top amateur athlete in the United States, was born in Bluffton in 1912.
- Daniel Patrick Moynihan, former U.S. Senator from New York, former U.S. Ambassador to the United Nations, former ambassador to India.
- Everett Scott, former baseball player, MLB New York Yankees and Boston Red Sox in the 1920s.
- Jim Barbieri, longtime editor and writer for the Bluffton News-Banner who died on April 1, 2006. He is considered to be one of the most prolific newspaper journalists in American history, working at the newspaper for 56 years.
- Randy Borror, member of the Indiana House of Representatives.
- Chandler Harnish is a member of the 2012 Indianapolis Colts. Harnish a record holding QB from Northern Illinois was drafted in 2012.
- "US Gazetteer files 2010". United States Census Bureau. Retrieved 2012-12-11.
- "American FactFinder". United States Census Bureau. Retrieved 2012-12-11.
- "Population Estimates". United States Census Bureau. Retrieved 2013-01-02.
- "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.
- "Find a County". National Association of Counties. Retrieved 2011-06-07.
- "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. 2011-02-12. Retrieved 2011-04-23.
- "2010 Census U.S. Gazetteer Files for Places – Indiana". United States Census. Retrieved 2012-10-20.
- Small Indiana Town Singing Tune of Racial, Ethnic Harmony. USA Today, 8/4/2006 
- National League of Cities Official Website