[8] The former municipalities that now make up Haute-Sorne have a total combined area of 71.04 km2 (27.43 sq mi).

[10] The former municipality is located on the Delémont-Glovelier road on the right bank of the Sorne river.

The village lies at the intersection of the old road from Porrentruy to Biel and from Delemont to La Chaux-de-Fonds.

[10] The former municipality is located between two of the Sorne river canyons and at the foot of Pichoux mountain.

[11] The historical population is given in the following chart:[12] The Saint-Germain-d'Auxerre Church in Courfaivre, the Farm House at Au Village 17 and the prehistoric shelter at Le Mont in Glovelier is listed as a Swiss heritage site of national significance.

[13] Notable sights in the Undervelier area include the cave of Sainte-Colombe and the Gorges of Pichoux.

Other sights include the Vellerat Posé because of its greenery and the chapel Place Roland Béguelin built by Jeanne Bueche and André Bréchet's stained glass windows.

The municipality has four railway stations: Glovelier, Bassecourt, Courfaivre, and Combe-Tabeillon.

The first three are located on the Delémont–Delle line and have regular service to Biel/Bienne, Olten, and Meroux (in France).