The canton of Saint-Quentin-Sud is an administrative division in northern France

France

The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

. It includes the following communes:
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| Gauchy

Gauchy

Gauchy is a commune in the Aisne department in Picardy in northern France.-Population:...

 || align="right" | 5 621 || align="right" | 2430 || align="right" | 02340
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| Harly

Harly

Harly is a commune in the Aisne department in Picardy in northern France.-Geography:The commune is located in the valley of the Homblières, it is bathed by the Somme and its marshes and Streaming of Harly.-History:* Latin name: Harcliacum...

 || align="right" | 1 803 || align="right" | 2100 || align="right" | 02371
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| Homblières

Homblières

Homblières is a commune in the Aisne department in Picardy in northern France.-Population:-References:*...

 || align="right" | 1 462 || align="right" | 2720 || align="right" | 02383
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| Mesnil-Saint-Laurent

Mesnil-Saint-Laurent

Mesnil-Saint-Laurent is a commune in the Aisne department in Picardy in northern France.-References:*...

 || align="right" | 426 || align="right" | 2720 || align="right" | 02481
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| Neuville-Saint-Amand

Neuville-Saint-Amand

Neuville-Saint-Amand is a commune in the Aisne department in Picardy in northern France.-References:*...

 || align="right" | 908 || align="right" | 2100 || align="right" | 02549
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| Saint-Quentin

Saint-Quentin, Aisne

Saint-Quentin is a commune in the Aisne department in Picardy in northern France. It has been identified as the Augusta Veromanduorum of antiquity. It is named after Saint Quentin, who is said to have been martyred here in the 3rd century....

|| align="right" | 17 667 || align="right" | 2100 || align="right" | 02691
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