| Official Name: | Green Hill, Indiana |
| Settlement Type: | Unincorporated community and Census-designated place |
| Pushpin Map: | USA Indiana Warren County#Indiana#USA |
| Pushpin Label: | Green Hill |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Indiana |
| Subdivision Type2: | County |
| Subdivision Name2: | Warren |
| Subdivision Type3: | Township |
| Subdivision Name3: | Medina |
| Established Title: | Founded |
| Established Date: | 1832 |
| Founder: | William and Horatio Bailey |
| Named For: | Green Hill Seminary |
| Area Total Km2: | 1.21 |
| Area Land Km2: | 1.21 |
| Population As Of: | 2020 |
| Population Total: | 125 |
| Population Density Km2: | 102.95 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Coordinates: | 40.4136°N -87.1117°W |
| Elevation Ft: | 653 |
| Postal Code Type: | ZIP code |
| Postal Code: | 47970 |
| Area Code: | 765 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 2806492 |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Sq Mi: | 0.47 |
| Area Water Km2: | 0.00 |
| Area Land Sq Mi: | 0.47 |
| Area Water Sq Mi: | 0.00 |
| Population Density Sq Mi: | 266.52 |
Green Hill is a small unincorporated community in Medina Township, Warren County, in the U.S. state of Indiana.
The town was platted on March 5, 1832 by William B. Bailey and his brother Horatio who named it Milford, for their home town of Milford, Delaware.[2] The plat included 48 lots, two north/south streets (Main and East) and three east/west streets (Pine, Center and Warren). The first store opened in 1833 and was followed in subsequent years by several more businesses, including a liquor store, blacksmith, grocery, tannery, shoe-maker, wagon-maker and others. A post office was established on December 2, 1837 as Poolesville, in honor of the town's first resident physician, Dr. Poole — it retained the name until August 13, 1904.[3]
In 1869 the citizens of the town voted to incorporate, and renamed it from Milford to Green Hill, owing to the town's Green Hill Seminary which the United Brethren established there.[4] An 1883 history of the area cited Green Hill's population as "over two hundred".
In common with many other small Midwestern communities, Green Hill diminished during the 20th century as its rural population dwindled or moved to more urban areas. Current population in undetermined, but satellite photography shows perhaps 30 homes in and around the town.
One of Green Hill's most notable natives is NASA astronaut Donald E. Williams, who served as pilot on the Space Shuttle Discovery (STS-51-D) in 1985 and as commander of the Atlantis (STS-34) in 1989.[5]
Civil War general George Day Wagner was raised on a farm near Green Hill, and is buried in Armstrong Cemetery.
Green Hill is located in the far northeastern part of the county, about northeast of the county seat of Williamsport, south of Otterbein and less than a mile from the border with Tippecanoe County. It overlooks Little Pine Creek which flows along its north and west.