Hyon Iyon (Picard)
Sub-municipality of Mons
Coat of arms
Location of Hyon
Location of Hyon in Mons
Hyon Show map of Belgium Hyon Show map of Hainaut (Belgium)
Coordinates: 50°26′21″N 3°57′43″E / 50.43917°N 3.96194°E / 50.43917; 3.96194
Country	Belgium
Community	French Community
Region	Wallonia
Province	Hainaut
Arrondissement	Mons
Municipality	Mons
Area
• Total	3.67 km2 (1.42 sq mi)
Population  (2020-01-01)
• Total	4,099
• Density	1,100/km2 (2,900/sq mi)
Postal codes	7022
Area codes	065

Hyon (French pronunciation: [jɔ̃]; Picard: Iyon) is a sub-municipality of the city of Mons located in the province of Hainaut, Wallonia, Belgium. It was a separate municipality until 1972. On 1 January 1972, it was merged into Mons.^[1]

• 
  The village seen from the summit of Mount Héribus.
• 
  Bridge/Dam on the river la Trouille (16th century).
• 
  Bridge/Dam.
• 
  Church Saint-Martin (1874-1876).
• 
  Remarkable hybrid plane of the common park.
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  The Tree of the Liberty - Common Lime planted in the end of the 18th century.