Ely ( ) is a cathedral city and civil parish in the district of East Cambridgeshire in Cambridgeshire, England. It lies north-east of Cambridge, south-east of Peterborough, and from London. As well as the built up area itself, the parish also covers surrounding rural areas including the settlements of Chettisham, Prickwillow, Mile End, Queen Adelaide, and Stuntney. At the 2021 census the built up area had a population of 19,185 and the parish had a population of 20,574.

Ely is built on a Kimmeridge Clay island which, at , is the highest land in the Fens. It was due to this topography that Ely was not waterlogged like the surrounding Fenland, and an island separated from the mainland. Major rivers including the Witham, Welland, Nene and Great Ouse feed into the Fens and, until draining commenced in the eighteenth century, formed freshwater marshes and meres within which peat was laid down. Once the Fens were drained, this peat created a rich and fertile soil ideal for farming.

The River Great Ouse was a significant means of transport until the Fens were drained and Ely ceased to be an island in the seventeenth century. The river is now a popular boating spot and has a large marina. Although now surrounded by land, the city is still known as the Isle of Ely.

There are two Sites of Special Scientific Interest in the city: a former Kimmeridge Clay quarry, and one of the United Kingdom's best remaining examples of medieval ridge and furrow agriculture.

The economy of the region is mainly agricultural. Before the Fens were drained, eel fishing was an important activity, from which the settlement's name may have been derived. Other important activities included wildfowling, peat extraction, and the harvesting of osier (willow) and sedge (rush). The city had been the centre of local pottery production for more than 700 years, including pottery known as Babylon ware. A Roman road, Akeman Street, passes through the city; the southern end is at Ermine Street near Wimpole and its northern end is at Brancaster. Little direct evidence of Roman occupation in Ely exists, although there are nearby Roman settlements such as those at Little Thetford and Stretham.

A coach route, known to have existed in 1753 between Ely and Cambridge, was improved in 1769 as a turnpike (toll road). The present-day A10 closely follows this route. Ely railway station, built in 1845, is on the Fen Line and is now a railway hub, with lines north to King's Lynn, northwest to Peterborough, east to Norwich, southeast to Ipswich and south to Cambridge and London.

Henry II granted the first annual fair, Saint Etheldreda's (or Saint Audrey's) seven-day event, to the abbot and convent on 10 October 1189. The word "tawdry" originates from cheap lace sold at this fair. A weekly market has taken place in Ely Market Square since at least the 13th century. Markets are now held on Thursdays, Saturdays and Sundays, with a farmers' market on the second and fourth Saturdays of each month.

Present-day annual events include the Eel Festival in May, established in 2004, and a fireworks display in Ely Park, first staged in 1974. The city of Ely has been twinned with Denmark's oldest town, Ribe, since 1956. Ely City Football Club was formed in 1885.

Toponymy The origin and meaning of Ely's name have always been deemed obscure by place name scholars and are still disputed. The earliest record of the name is in the Latin text of Bede's Ecclesiastical History of the English People, written 731, where it is written as Elge. This is apparently not a Latin name, and subsequent Latin texts nearly all used the forms , , or with inorganic H-. In Old English charters, and in the Anglo-Saxon Chronicle, the spelling is usually . Bede states that the name was a reference to the large number of eels caught in the marshes there.

Skeat derived the name Ely from what he called "O[ld] Northumbrian" , meaning "district of eels". This uses a hypothetical word *ġē, which is not recorded in isolation but thought by some to be related to the modern German word Gau, meaning "district". The theory is that the name then developed a vowel to become , and was afterwards re-interpreted to mean "Eel Island". This essentially is the explanation accepted by Reaney, Ekwall, Mills and Watts.

But difficulties remain. Bailey, in his discussion of ġē names, has pointed out that Ely would be anomalous if really from "eel district", being remote from the areas where possible examples of ġē names occur, and moreover, there is no parallel for the use of a fish-name in compounds with ġē. More seriously, the usual English spelling remains , even in the dative case used after many prepositions, where would be expected if the second element were īġ "island". This is in conflict with all the other island names which surround Ely.

Another option, discussed by Miller in Fenland Notes and Queries, is that the name is an old Celtic name deriving either from the Brythonic helig (modern Welsh helyg) meaning willows or heli meaning salt water. Miller construes the name as meaning the singular and thinks it odd a place so abounding in the trees would be called 'a willow'.

History

Pre-history Roswell Pits are a palaeontologically significant Site of Special Scientific Interest (SSSI) northeast of the city. The Jurassic Kimmeridge Clays were quarried in the 19th and 20th centuries for the production of pottery and for maintenance of river embankments. Many specimens of ammonites, belemnites and bivalves were found during quarrying, in addition to an almost complete specimen of a pliosaur.

There is some scattered evidence of Late Mesolithic to Bronze Age activity in Ely such as Neolithic flint tools, a Bronze Age axe and spearhead. There is slightly denser Iron Age and Roman activity with some evidence of at least seasonal occupation. For example, a possible farmstead, of the late Iron Age to early Roman period, was discovered at West Fen Road and some Roman pottery was found close to the east end of the cathedral on The Paddock. There was a Roman settlement, including a tile kiln built over an earlier Iron Age settlement, in Little Thetford, to the south.

Medieval period

The city's origins lay in the foundation of an abbey in 673, to the north of the village of Cratendune on the Isle of Ely, under the protection of Saint Etheldreda, daughter of King Anna. St Etheldreda (also known as Æthelthryth) was a queen, founder and abbess of Ely. She built a monastery in 673 AD, on the site of what is now Ely Cathedral. This first abbey was destroyed in 870 by Danish invaders and rededicated to Etheldreda in 970 by Ethelwold, Bishop of Winchester. The abbots of Ely then accumulated such wealth in the region that in the Domesday survey (1086) it was the "second richest monastery in England".Ely. Open Domesday. Accessed 16 November 2025. The first Norman bishop, Simeon, started building the cathedral in 1083. The octagon was rebuilt by sacrist Alan of Walsingham between 1322 and 1328 after the collapse of the original nave crossing on 22 February 1322. Ely's octagon is considered "one of the wonders of the medieval world". Architectural historian Nikolaus Pevsner believes the octagon "is a delight from beginning to end for anyone who feels for space as strongly as for construction" and is the "greatest individual achievement of architectural genius at Ely Cathedral". This gave the cathedral its distinctive shape, earning it the moniker, "The Ship of the Fens". Building continued until the dissolution of the abbey in 1539 during the Reformation. The cathedral was sympathetically restored between 1845 and 1870 by the architect George Gilbert Scott. As the seat of a diocese, Ely has long been considered a city; in 1974, city status was granted by royal charter.

Cherry Hill is the site of Ely Castle which is of Norman construction and is a United Kingdom scheduled monument. Of similar construction to Cambridge Castle, the diameter, high citadel-type motte and bailey is thought to be a royal defence built by William the Conqueror following submission of the Isle from rebels such as the Earl Morcar and the folk-hero Hereward the Wake from the Ely Rebellion. This would date the first building of the castle to  1070.

Henry III of England granted a market to the Bishop of Ely using letters close on 9 April 1224 although Ely had been a trading centre prior to this. Present weekly market days are Thursday and Saturday and seasonal markets are held monthly on Sundays and Bank Holiday Mondays from Easter to November.

Protestant martyrs

Following the accession of Mary I of England to the throne in 1553, the papacy made its first effective efforts to enforce the Pope Paul III-initiated Catholic reforms in England. During this time, which became known as the Marian Persecutions, two men from Wisbech, constable William Wolsey and painter Robert Pygot, "were accused of not ... believing that the body and blood of Christ were present in the bread and wine of the sacrament of mass". For this Christian heresy they were condemned by the bishop's chancellor, John Fuller, on 9 October 1555. On 16 October 1555 they were burnt at the stake "probably on the Palace Green in front of Ely Cathedral". In The Book of Ely published in 1990, Blakeman writes that "permission was not given" for a memorial to the martyrs to be placed on Palace Green. In 2011, a plaque recording this martyrdom event was erected on the northeast corner of Palace Green by the City of Ely Perspective. The plaque is located 2 inches from the pavement floor in an obscure, easily missed corner.

Oliver Cromwell

Oliver Cromwell lived in Ely from 1636 to 1646 after inheriting St Mary's vicarage, a 16th-century property — now known as Oliver Cromwell's House — from his mother's brother, Sir Thomas Steward. The house is now open to the public. During this time Cromwell was a tax collector, though was also one of the governors of Thomas Parsons' Charity, which dates back to 1445 and was granted a Royal Charter by Charles I of England. The Charity still provides grants and housing to deserving local applicants.

There was a form of early workhouse in 1687, perhaps at St Mary's, which may have been part of an arrangement made between the Ely people and a Nicholas Wythers of Norwich in 1675. He was paid £30 per annum to employ the poor to "spin jersey" and was to pay them in money not goods. A purpose-built workhouse was erected in 1725 for 35 inmates on what is now St Mary's Court. Four other workhouses existed, including Holy Trinity on Fore Hill for 80 inmates (1738–1956) and the Ely Union workhouse, built in 1837, which housed up to 300 inmates. The latter became Tower Hospital in 1948 and is now a residential building, Tower Court. Two other former workhouses were the Haven Quayside for unmarried mothers and another on the site of what is now the Hereward Hall in Silver Street.

Post-medieval decline