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Largest city in the Aisne department: the 2026 ranking

The 797 towns of the Aisne department (02) ranked by population, area and density, based on the official INSEE population figures in force in 2026.

The largest city in the Aisne department is Saint-Quentin, with 53,963 inhabitants (ranked 119th in France by population). The largest town by area is Sissonne (54 km²). Saint-Quentin is also the most densely populated town, with 2,392 inhabitants per km². At the other end of the ranking, Tannières has only 16 inhabitants.

The Aisne department has 534,380 inhabitants over 7,358 km², a density of 73 inhabitants per km², 1.5 times lower than the national average (110 per km²). It accounts for 8.8% of the population of Hauts-de-France, the region it has belonged to since the 2016 reform (formerly Picardie): see the ranking of the largest cities in Hauts-de-France.

The 20 largest cities in the Aisne department by population

# Town Population km² per km² France rank
1 Saint-Quentin 53,963 23 2,392 119th
2 Soissons 28,664 12 2,327 311th
3 Laon 24,809 42 591 373rd
4 Château-Thierry 15,366 17 928 653rd
5 Tergnier 13,213 18 736 771st
6 Chauny 12,024 13 905 843rd
7 Villers-Cotterêts 10,885 42 261 950th
8 Hirson 8,595 34 255 1,258th
9 Bohain-en-Vermandois 5,671 32 179 2,019th
10 Gauchy 5,249 6.2 841 2,167th
11 Guise 4,549 16 282 2,522nd
12 Belleu 3,726 4.5 823 3,097th
13 Saint-Michel 3,235 42 77 3,563rd
14 Crouy 3,087 10 297 3,737th
15 Fresnoy-le-Grand 2,924 15 194 3,926th
16 La Fère 2,915 6.7 433 3,941st
17 Fère-en-Tardenois 2,872 20 141 3,986th
18 Villeneuve-sur-Aisne 2,824 25 113 4,040th
19 Essômes-sur-Marne 2,756 29 97 4,120th
20 Villeneuve-Saint-Germain 2,655 4.5 585 4,274th

Largest towns by area in the Aisne department

# Town Population km² per km² France rank
1 Sissonne 2,147 54 40 996th
2 Le Nouvion-en-Thiérache 2,495 48 52 1,276th
3 Saint-Michel 3,235 42 77 1,808th
4 Laon 24,809 42 591 1,821st
5 Villers-Cotterêts 10,885 42 261 1,852nd
6 Vallées en Champagne 611 41 15 1,914th
7 Dhuys et Morin-en-Brie 837 40 21 2,078th
8 Les Septvallons 1,246 38 33 2,316th
9 Hirson 8,595 34 255 3,055th
10 Bohain-en-Vermandois 5,671 32 179 3,497th

Most densely populated towns in the Aisne department

# Town Population km² per km² France rank
1 Saint-Quentin 53,963 23 2,392 378th
2 Soissons 28,664 12 2,327 389th
3 Château-Thierry 15,366 17 928 1,017th
4 Chauny 12,024 13 905 1,049th
5 Gauchy 5,249 6.2 841 1,134th
6 Belleu 3,726 4.5 823 1,162nd
7 Tergnier 13,213 18 736 1,287th
8 Étampes-sur-Marne 1,356 2.2 605 1,548th
9 Laon 24,809 42 591 1,581st
10 Villeneuve-Saint-Germain 2,655 4.5 585 1,602nd

All towns in the Aisne department (797)

INSEE total population in parentheses. Each town page gives its area, density, national and departmental rankings, and neighboring towns.

Other departments in Hauts-de-France

Nord (59) Oise (60) Pas-de-Calais (62) Somme (80) All departments

Sources: INSEE, official population figures in force on January 1, 2026 (total population); land area: IGN / Observatoire des territoires. Rankings computed across the 34,858 communes in the database.

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