Hallencourt is a commune with 1402 inhabitants (as of 1 January 2011) in the department of Somme in the Picardie region; it belongs to the district Abbeville and the Canton Hall Court.
On January 1, 1972, the municipality was merged with Hocquincourt Hallencourt.
- Church of Saint- Denis in Hallencourt
- Church of Saint- Firmin in Hocquincourt
- Beauvoir Castle (18th century)
- Charles de Monchy d' Hocquincourt Marquis (1599-1658), Military
- Roman Opałka (1931-2011), born in Hocquincourt