Longdon-upon-Tern (also known as Longdon-on-Tern or colloquially Longdon) is a village in the civil parish of Rodington, in the unitary district of Telford and Wrekin, in Shropshire, England.

The name Longdon is derived from two Old English words, lang and dūn, meaning long hill.

[2] A settlement at Longdon-Upon-Tern dates to at least the Normans, as it is mentioned in the Domesday Book of 1086 as Languedune, held by St. Alkmund's Church, Shrewsbury.

[7] On the same site stands the refurbished Grade II* listed Longdon-Upon-Tern village hall,[8] formerly a schoolhouse provided by the Duke of Sutherland and opened in 1849.

The village is particularly notable as the location of the world's first large-scale cast iron navigable aqueduct (52°44′13″N 2°34′04″W / 52.737013°N 2.567885°W / 52.737013; -2.567885, grid reference SJ617156).

It is Grade I listed and a scheduled ancient monument, situated in fields astride the River Tern.

[12] The closest railway station is 6.4 km (4 mi) away in Wellington, from here there are frequent services to Shrewsbury and Birmingham.