Laleham is a village on the River Thames, in the borough of Spelthorne, about 17 mi (27 km) west of central London, England. Historically part of the county of Middlesex, it was transferred to Surrey in 1965. Laleham is downriver from Staines-upon-Thames and upriver from Chertsey.

The north of the area has a number of sports fields, including the Staines and Laleham Sports Ground, and two family pubs, one each on the Laleham and Ashford Roads. Laleham Park, by the River Thames, is south of the village.

Laleham is just over 3 miles (5 km) from three motorway junctions. The nearest railway station is Staines, 1.5 miles (2.4 km) north, on the Waterloo to Reading Line. Two Surrey County Council bus routes serve the village.

The poet Matthew Arnold (1822–88) lived here, dividing his time between Laleham and Rugby School.

The toponym "Laleham" comes from lael meaning twig and hamm (land in a river bend) or from Lella's ham (cognate with holm or homestead), meaning farmstead owned by a person named similarly to the first syllable.

There may have been a 1st-century Roman marching camp in the far north, in a field which is now part of Matthew Arnold School.

Iron Age spearheads from the 5th century have been found in the Thames at the point where a ferry used to run. Tenth century charters, see Chertsey Abbey (which long owned the lands surrounding its Abbey across the Thames) record the village/parish as Laelham.

The Middlesex section of the Domesday Book of 1086 records the village as Leleham. The manor was held partly by Fécamp Abbey from Robert of Mortain and by Estrild, the nun; its owner before Norman Conquest there recorded as Aki (the Dane). Middlesex formed the far south of the Danelaw. Its Domesday assets were: 10 hides of land, 6½ ploughs, 5 ploughlands, meadow and cattle pasture. Its villagers and chief tenants rendered £5 per year to its feudal overlords. The manor of Laleham was within a few generations held by Westminster Abbey throughout its monetary heyday.