Ahun (French pronunciation: [a.œ̃]; Occitan: Aiun) is a commune in the Creuse department in the Nouvelle-Aquitaine region in central France.

A farming area comprising the village and several hamlets situated in the valley of the Creuse, some 15 km (9.3 mi) southeast of Guéret, at the junction of the D942, D13 and the D18. It was the Roman site of Acitodunum, an important town on the route between Limoges and Clermont-Ferrand.

Historical population

Year	Pop.	±% p.a.
1968	1,623	—
1975	1,605	−0.16%
1982	1,529	−0.69%
1990	1,481	−0.40%
1999	1,501	+0.15%
2007	1,557	+0.46%
2012	1,528	−0.38%
2017	1,432	−1.29%
Source: INSEE

• The viaduct carrying the railway 57m over the river, built by Lloyds and Nordling in 1864.
• The church of St.Sylvain, dating from the twelfth century.
• Three fifteenth century chateaux.

• Saint Silvanus of Ahun (Silvain), martyred and buried in the village.
• Jean Auclair, politician.

• Communes of the Creuse department

• Ahun on the Quid website (in French)