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Sugar Grove Meetinghouse and Cemetery is a historic Quaker meeting house and cemetery located in Guilford Township, Hendricks County, Indiana. The meeting house was built in 1870, and enlarged in the late-1870s or early-1880s. It is a one-story, rectangular brick building with a gable roof and connected to other buildings by a covered porch. Also on the property are the contributing school house, privy, and storage shed. The cemetery includes burials dating from the 1840s to 1960s.The meetinghouse interior is split into two rooms of the same size and layout for male and female congregants. The partition wall between them has wooden panels which can be opened or closed.It was added to the National Register of Historic Places in 2000. As of 2013, the meetinghouse was used occasionally by a local Quaker group and had been restored without modern plumbing, lights, or air conditioning.

The Indiana Boys School (IBS) was opened in 1867 as a correctional institution for adolescent boys. It was located on U.S. Route 40 just outside Plainfield, Indiana. For 138 years, it was the primary correctional facility for juvenile males in Indiana. In October 2005, the grounds and building were transformed into a pre-release center for adult males, while the boys were transferred to a new facility located on the grounds of the Indianapolis Juvenile Correctional Facility (formerly the Indiana Girls School) in west Indianapolis. IBS was a state operated, medium to maximum-security facility with approximately 245 staff and 335 boys housed in campus style cottages.

Hendricks County Bridge Number 316, also known as Friendship Gardens Bridge, is a historic Pinned Warren Truss bridge located at Plainfield, Hendricks County, Indiana. It was built in 1886, by the Morse Bridge Company of Youngstown, Ohio. The single span bridge measures 170 feet long and spans White Lick Creek.It was added to the National Register of Historic Places in 2003.

Indiana Boys SchoolThe Heritage Trail Correctional Facility is a private minimum-security state prison for men located in Plainfield, Hendricks County, Indiana, operated by the GEO Group under contract with the Indiana Department of Correction.Heritage Trail is operated at minimum security and focuses on inmates transitioning out of the system. Heritage Trail first opened in 2014 following the closure of the Indiana Boys School. The facility had an average capacity of 827 inmates through 2014. The facility stands on the site of the former state reformatory, the Indiana House of Refuge, first established in 1867.

Plainfield Correctional Facility is a prison for men of the Indiana Department of Correction located in Plainfield, Indiana.The facility opened in 1969 as the Indiana Youth Center.As of 2016, the prison housed 1,659 inmates, and employed 333 staff.

Plainfield Community School Corporation (PCSC) is a school district headquartered in Plainfield, Indiana.

THI and E Interurban Depot-Substation, also known as Plainfield Interurban Depot, is a historic interurban train station located at Plainfield, Hendricks County, Indiana.

Plainfield Historic District is a national historic district located at Plainfield, Hendricks County, Indiana. The district encompasses 174 contributing buildings in the central business district and surrounding residential area of Plainfield. The district developed between about 1840 and 1959 and includes notable examples of Greek Revival, Gothic Revival, Italianate, Queen Anne, and Bungalow / American Craftsman style architecture. Notable buildings include the Ezra Cox House (c. 1861–1863), Oscar Hadley House (1891), Plainfield Carnegie Library (1912), Plainfield Methodist Episcopal Church (1891), Bly Bros. Dry Goods Store (c. 1880), Knights of Pythias Building (c. 1900), Prewitt Theater (1927), First National Bank of Plainfield (1903), Mansion House Hotel (1874), Fisher's Tavern (c. 1840), and Quaker Meeting House (1857-1858).It was added to the National Register of Historic Places in 2010.

Plainfield is a town in Guilford, Liberty, and Washington townships, Hendricks County, Indiana, United States. The population was 27,631 at the 2010 census, and in 2022 the estimated population was 36,074.

Guilford Township is one of twelve townships in Hendricks County, Indiana, United States. As of the 2010 census, its population was 27,844.

Plainfield High School (abbreviated PHS) in Plainfield, Indiana, United States. It is a public high school located within the Plainfield Community School Corporation.

WWDL is a Christian radio station licensed to Plainfield, Indiana, broadcasting on 91.3 MHz FM. The station serves Southwestern Indianapolis and its Southwest Suburbs, and is owned by The Power Foundation. WWDL airs southern gospel music and Christian talk and teaching.