Bellenglise (French pronunciation: [bɛlɑ̃ɡliz]) is a commune in the department of Aisne in Hauts-de-France in northern France.

The village lies close to the N44, in a loop of the St. Quentin Canal, nine kilometres north of St. Quentin.

About two kilometres to the north is the Riqueval souterrain.

On the 28 August 1914 the French 10th Regiment of Territorial Infantry opposed a German invading force. The French unit was essentially from the local Département, with its depot in St Quentin. Despite a fierce defence, the French line gave and a battalion (1000 men) of the unit was taken prisoner.

The famous picture of the British 137th Brigade, gathered on the canal bank at Riqueval Bridge, for a pep talk after the crossing of the St. Quentin Canal, was taken nearby.

Historical population

Year	Pop.	±% p.a.
1968	426	—
1975	517	+2.80%
1982	479	−1.08%
1990	441	−1.03%
1999	410	−0.81%
2007	389	−0.66%
2012	383	−0.31%
2017	381	−0.10%
Source: INSEE

• The commune cemetery, with its military square just to the left of the entrance, where are buried soldiers who died for France.

• Communes of the Aisne department

• Bellenglise on the site of the French National Geographical Institute
• Belenglise church tower on the Clochers (church belfries) site