Roisel (French pronunciation: [ʁwazɛl]) is a commune in the Somme department in Hauts-de-France in northern France.

Roisel is situated 10 miles (16 km) northwest of Saint-Quentin, on the D6 road, with the small river ‘La Cologne’ (a tributary of the Somme) flowing through the commune.

Historical population

Year	Pop.	±% p.a.
1968	1,908	—
1975	1,846	−0.47%
1982	1,976	+0.98%
1990	1,960	−0.10%
1999	1,929	−0.18%
2007	1,821	−0.72%
2012	1,740	−0.91%
2017	1,613	−1.50%
Source: INSEE

The name of Roisel has an etymology close to that of "roseau" (en:reed) and it's possible, given the ponds, lakes and marches, that the commune takes its name from the landscape. Roisel has strong connections with Saint Fursey.

• St Martin's church. Destroyed during World War I, it was rebuilt by local architect Louis Faille, from Nurlu, soon after 1928
• The town hall (Hotel de ville), rebuilt in 1926 by Maurice Lucet].

• Communes of the Somme department