This commune covers an area of 9.5km² and has 326 inhabitants who are known as ‘Sommevaliens’. It is located 20km south-west of Troyes. Reached via the D72 or the D89, it is 20km from junction 21 (Saint-Thibault) of the A5 from Paris.

Sommeval is close to the little valleys of the Pays d’Othe, and is largely made up of the woodland that surrounds the fields that spread out to the south of the village. It is part of a school group with the communes of Bouilly, Javernant et Souligny. Village life in Sommeval is organised by voluntary groups, especially the festivities committee. It has been awarded two flowers by the Villes et Villages Fleuris organisation. There are several hiking trails that can be joined in Sommeval, including the GR2 between Paris and Dijon and the Sentier du Loup which passes through the woods of the Pays d’Othe.

The church of Saint-Martin dates from 1834 and is in the middle of the village. The bell tower dates from the 17th century, but the distinctive feature of this church is its ceiling. The framework is visible, and massive oak beams form lines and crosses along the nave. Several statuettes that are kept in the church have been classified as historic monuments since the 1980s, including a polychrome oak statue of St Nicholas dating from the 16th or 17th century, an 18th-century wooden statue of St Eloi, a 19th-century oak Madonna and Child and a limestone statue of Sainte Marguerite.

In front of the cemetery, the war memorial - which consists of an obelisk on a plinth surrounded by shells and decorated with the victory palm - commemorates the victims of the First World War.