The Canton of Saint-Romain-de-Colbosc is a canton situated in the Seine-Maritime département and in the Normandy region of northern France.

An area of farming and light industry in the arrondissement of Le Havre, centred on the town of Saint-Romain-de-Colbosc. The altitude varies from 0m (La Cerlangue) to 135m (La Remuée) with an average altitude of 107m.

At the French canton reorganisation which came into effect in March 2015, the canton was expanded from 18 to 38 communes:

Historical population

Year	Pop.	±% p.a.
2013	33,148	—
2018	33,776	+0.38%
Source: INSEE

• Arrondissements of the Seine-Maritime department
• Cantons of the Seine-Maritime department
• Communes of the Seine-Maritime department

49°31′45″N 0°20′45″E / 49.52917°N 0.34583°E / 49.52917; 0.34583