Finmere is a village and civil parish in Oxfordshire, south of the River Great Ouse. It is on the county boundary with Buckinghamshire, almost 4 miles (6 km) west of Buckingham and just over 4 miles (6 km) east of Brackley in Northamptonshire. The 2011 Census recorded the parish's population as 466.

In 2000 archaeologists found evidence of Bronze Age, Iron Age and Roman activity in Finmere Quarry about 3⁄4 mile (1.2 km) west of the village. Five early Bronze Age cremation pits were excavated, and from one pit two collared urns were recovered. The cremations were dated to about 2040 to 1880 BC.

The site of a late Iron Age settlement was found west of the cremation pits and just east of the trackbed of the former Great Central Main Line railway. The settlement consisted originally of a number of roundhouses packed close together in a straight line, and then developed in phases with later structures overlapping the sites of some of the earlier ones. Enclosures, presumably to contain livestock, were created at different times and in different shapes, with the outlines of some enclosures from different periods overlapping the sites of the roundhouses and each other. Iron Age pottery recovered from the site suggests that the settlement was occupied in phases from the 4th to the 1st century BC.

A pair of ditches were found running parallel across the site about 4.5 metres (15 ft) apart and roughly east–west. The ditches were identified as flanking a track, and fragments of wheel-thrown pottery found on part of the site led to the track being dated to the period of Roman occupation of Britain. The site is about 0.8 miles (1.3 km) from the course of the Roman road that linked Alchester near Bicester with Lactodurum (now Towcester), which runs through the eastern side of Finmere village.

Finmere's toponym is derived from the Old English for "pool frequented by woodpeckers". The village includes the hamlet of Little Tingewick.

Before and after the Norman Conquest of England Wulfward the White, a thegn of King Edward the Confessor's Queen Edith, owned the Manor of Finmere. However, by 1086 William of Normandy had granted the manor to Geoffrey de Montbray, who was Bishop of Coutances but also one of William's senior military commanders. Subsequently, the manor passed to the Earls of Gloucester, in whose family it stayed until the 4th Earl of Gloucester died without a successor in 1314. In 1347 the manor passed to the 1st Earl of Stafford, in whose family it then remained.

Finmere had a parish church by 1189, when its advowson was granted to the Augustinian Friary in Bristol. The only surviving remnant from the parish church of that period seems to be the 12th century font. The earliest surviving parts of the present Church of England parish church of St Michael and All Angels are the tower, the north wall of the chancel and the Decorated Gothic windows in the chancel and the south wall of the nave. The Perpendicular Gothic clerestory was added later. The church underwent major repairs at various times in the 17th, 18th and 19th centuries. A west gallery was added, probably in the 1760s. In 1856–58 the Gothic Revival architect G.E. Street removed the west gallery, restored the church, widened the chancel arch and added the north aisle. A vestry was added in 1868 and a porch in 1876. The architectural historians Sir Nikolaus Pevsner and Jennifer Sherwood criticised Street's alterations for being "too aggressive" and dominating the rest of the building.

St. Michael's bell tower has three bells. William Chamberlain of Aldgate cast the tenor in about 1470 and an unidentified bellfounder cast the treble in about 1599. The middle bell is of unknown age but Lester and Pack of the Whitechapel Bell Foundry recast it in 1754.