According to A Dictionary of British Place Names Grendon derives from the Old English 'grēne' with 'denu' meaning "green valley".

[6] Directories from 1856 to the First World War show Grendon Bishop as a parish in the Broxash Hundred—and as a township before 1860—in the Bromyard petty sessional division, county court district, and Union – poor relief and joint workhouse provision set up under the Poor Law Amendment Act 1834.

[7][8][9][10][11][12] Residents, trades and occupations listed at Grendon Bishop in the 1850s were four farmers, a blacksmith, a wheelwright, a carpenter, a shopkeeper, and a land agent.

[7][8][9][10][11][12][13] In 2018 a parish 'Characterisation Study' was undertaken which aimed to "address the historic character and local distinctiveness of the area "through volunteer fieldwork and desk-based" research.

The study, which was published in January 2019, was designed to inform a future Bredenbury, Wacton and Grendon Bishop Neighbourhood Development Plan.

[14] Grendon Bishop is represented on the lowest tier of UK governance by three councillors on the Bredenbury & District Group Parish Council.

[16][17] Grendon Bishop is represented in the UK parliament as part of the North Herefordshire constituency, held by the Conservative Party since 2010 by Bill Wiggin.

Grendon Bishop, a civil parish with no village of the same name, at the north-east of Herefordshire, covers an area of 1,705 acres (7 km2), and is about 3 miles (5 km) both north to south and east to west.

Adjacent civil parishes are Hatfield and Newhampton at the north, Wacton at north-east, Bredenbury at east, Pencombe with Grendon Warren at the south, Humber at south-west, and Docklow and Hampton Wafer at the west.

Grendon Bishop is in the civil registration district of Bromyard, and is entirely rural, of farms, fields and streams, isolated and dispersed businesses and residential properties.

The only mapped nucleated settlement is Grendon Green at the junction of the A44 and a minor road running north to Hatfield, Hampton Charles and Bockleton.

Grendon Green comprises only an outlet for Claas agricultural vehicles, one house, and a bus stop with service connection to Ledbury, Bromyard and Leominster.

The church, of Gothic Revival style, and constructed in red sandstone with a tiled roof, comprises a nave, a chancel, a two-stage west tower with a shingle broach spire, and a south porch.

The house, originally a single floor-to-roof hall, was converted to two floors in the late 16th century, and extended in the 17th.

[30][38][39] Newbury Farmhouse (52°12′00″N 2°36′02″W / 52.200055°N 2.600601°W / 52.200055; -2.600601), a designated scheduled monument, is a probable early 17th-century "much altered" H-plan house, of two storeys plus attics and slate roof.

Constructed of rubble and red brick, it has a tiled roof and casement windows, two on each floor either side a central doorway.

[41][42] Westington Court (52°12′25″N 2°36′10″W / 52.206854°N 2.602682°W / 52.206854; -2.602682), listed in 1952 and a designated scheduled monument, is a timber-framed T-plan house dating to the 15th, 16th and 17th centuries.

The timber framing is in parts plastered over, with the south aspect faced in red brick with added and sash windows in the 18th century.