Downtown Westfield in 2005
Crossroads of Indiana
Location of Westfield in Hamilton County, Indiana.
WESTFIELD INDIANA Latitude and Longitude:
|• Mayor||Andy Cook ( R)|
|• Total||29.92 sq mi (77.48 km2)|
|• Land||29.70 sq mi (76.92 km2)|
|• Water||0.22 sq mi (0.56 km2)|
|Elevation||886 ft (270 m)|
| • Estimate |
|• Density||1,253.27/sq mi (483.89/km2)|
|Time zone||UTC−5 ( Eastern (EST))|
|• Summer ( DST)||UTC−4 (EDT)|
46074, 46032 (part), 46033 (part), 46062 (part)
|FIPS code||18-82700 |
|GNIS feature ID||0445833 |
Westfield is a city in Hamilton County, Indiana, United States. As of the 2010 census the population was 30,068,  and in 2017 the estimated population was 39,493.  Westfield is in the Indianapolis metropolitan area.
Westfield was founded on May 6, 1834, by North Carolina Quakers Asa Bales, Ambrose Osborne and Simon Moon.  It is believed that the town was planned as a stop on the Underground Railroad with many families of the Religious Society of Friends and the Wesleyan Methodist Church supporting the cause. When the laws against aiding escaped slaves were made harsher, part of the Westfield Quaker Friends Meeting House split into the Anti-Slavery Friends meeting.
Westfield was incorporated as a town in 1849. 
On January 1, 2008, Westfield was incorporated as a city, and Andy Cook was sworn in as mayor.  With recent annexations in southern Washington Township and rapid population growth in areas already occupied by the pre-existing town, the city population in 2010 (30,068) was more than triple that of 2000 (9,293). Because of the growing size of the city, officials are planning a major revitalization of city's downtown. New additions to downtown Westfield are expected to include a new library and city hall. 
|U.S. Decennial Census |
As of 2000 the median income for a household was $52,963; and for a family, $65,208. Males had a median income of $45,388; females, $26,864. The per capita income was $22,160. About 2.3% of families and 4.0% of the population were below the poverty line, including 2.5% of those under 18 years and 3.7% 65 years or over. The American Community Survey estimated the median household income in Westfield from 2007-2011 at $86,054 and the median family income at $96,374. 
As of the census of 2010,  there were 30,068 people, 10,490 households, and 8,146 families residing in the town. The population density was 1,120.3 inhabitants per square mile (432.6/km2). There were 11,209 housing units at an average density of 417.6 per square mile (161.2/km2). The racial makeup of the town was 90.9% White, 2.2% African American, 0.2% Native American, 2.5% Asian, 2.6% from other races, and 1.6% from two or more races. Hispanic or Latino of any race were 5.8% of the population.
There were 10,490 households of which 47.0% had children under the age of 18 living with them, 64.9% were married couples living together, 9.3% had a female householder with no husband present, 3.4% had a male householder with no wife present, and 22.3% were non-families. 18.0% of all households were made up of individuals and 4.6% had someone living alone who was 65 years of age or older. The average household size was 2.85 and the average family size was 3.27.
The median age in the town was 33.7 years. 31.9% of residents were under the age of 18; 5.9% were between the ages of 18 and 24; 31.6% were from 25 to 44; 23.7% were from 45 to 64; and 6.8% were 65 years of age or older. The gender makeup of the town was 48.9% male and 51.1% female.
Westfield is served by a local weekly newspaper, the Current in Westfield. The area is also served by the Times of Noblesville and the daily Hamilton County Reporter from the neighboring county seat of Noblesville. 
Grand Park is the largest youth sports campus in the United States, featuring 26 baseball and softball diamonds, 31 multipurpose fields for soccer, football, rugby, field hockey and lacrosse. An indoor events center opened in July 2016 that features 3 full-size multipurpose fields, and an indoor basketball/volleyball facility that features 8 courts, with 2 of them being NBA regulated, also opened and is named after the NBA's Indiana Pacers. Grand Park features an abundance of green space and more than 10 miles (16 km) of pedestrian/bicycle trails, including the largest trailhead on the Monon Corridor.
Since opening, the campus has hosted several major events including the following: Whale of a Sale Consignment Event, Little League Softball and Baseball Region Tournaments, USA Archery Finals, Big Ten Women's and Men's Soccer Tournaments, US Club Soccer NPL Finals and Nationals, Suburban Indy Consumer Shows, plus many more.
In 2017 Westfield signed a 10-year contract with the NFL's Indianapolis Colts for their annual training camp. 
The park has experienced about 750,000 visitors and 1,900,000 visits on average each year. 
U.S. Route 31 is the main highway through the city, leading north 31 miles (50 km) to Kokomo and south 9 miles (14 km) to Interstate 465, the beltway around Indianapolis. Downtown Indianapolis is 20 miles (32 km) south of the center of Westfield. Indiana State Road 32 is Westfield's Main Street and leads east 6 miles (10 km) to Noblesville, the county seat, and west 18 miles (29 km) to Lebanon.
According to the 2010 census, Westfield has a total area of 27.081 square miles (70.14 km2), of which 26.84 square miles (69.52 km2) (or 99.11%) is land and 0.241 square miles (0.62 km2) (or 0.89%) is water. 
- Herb Baumeister, alleged serial killer
- Claude Bowers, writer, Democratic politician, and ambassador to Spain and Chile
- Martha Doan, chemist and academic
- Thomas Jefferson Lindley, Civil War veteran, Indiana state representative and senator
- Seth Cook Rees, pastor; leading figure in the evangelical " holiness movement"
- Kevin Plawecki, Major League Baseball catcher, Westfield High School graduate
- Ambrose J. Tomlinson, first General Overseer, Church of God (Cleveland, Tennessee)
- Eriq Zavaleta, professional soccer player, Toronto FC
- Westfield High School (Grades 9-12)
- Westfield Middle School (Grades 7-8)
- Westfield Intermediate School (Grades 5-6)
- Carey Ridge Elementary School (Grades K-4)
- Maple Glen Elementary School (Grades K-4)
- Monon Trail Elementary School (Grades K-4)
- Oak Trace Elementary School (Grades K-4)
- Shamrock Springs Elementary School (Grades K-4)
- Washington Woods Elementary School (Grades K-4)
- Montessori School of Westfield
- St Maria Goretti School (Grades PreK-8)
- Union Bible College and Academy
The town has a lending library, the Westfield-Washington Public Library. 
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- Haines, John F. (1915). History of Hamilton County, Indiana: Her People, Industries and Institutions, Volume 1. B.F. Bowen & Co. pp. 235–237.
- Shirts, Augustus Finch (1901). A History of the Formation, Settlement and Development of Hamilton County, Indiana: From the Year 1818 to the Close of the Civil War. p. 207.
- "DEAD LINK". Indianapolis Star. Archived from the original on September 24, 2015. Retrieved January 4, 2019.
- "DEAD LINK" (PDF). Archived from the original (PDF) on March 13, 2016. Retrieved July 25, 2010.
- 2012 Boundary and Annexation Survey (BAS): Westfield city, IN[ permanent dead link], United States Census Bureau.
- National Park Service (2010-07-09). "National Register Information System". National Register of Historic Places. National Park Service.
- "Census of Population and Housing". Census.gov. Retrieved June 4, 2015.
- "American FactFinder Selected Economic Characteristics". United States Census Bureau. Retrieved 2013-12-15.
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- "Main Home". Current Publishing.
- Sikich, Chris (10 September 2017). "Colts to pay Grand Park $653K for 10 years but economic boost may be greater". Indianapolis Star.
- Erdody, Lindsey (22 December 2016). "Visits up at Grand Park in 2016". Indianapolis Business Journal (blog).
- "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. 2011-02-12. Retrieved 2011-04-23.
- "G001 - Geographic Identifiers - 2010 Census Summary File 1". United States Census Bureau. Retrieved 2015-07-29.
- "Indiana public library directory" (PDF). Indiana State Library. Retrieved 7 March 2018.