Vingtaine du Mont Cochon is one of the six vingtaines of the Parish of St. Helier, in the Channel Island of Jersey. It is close to St Lawrence.
This vingtaine forms St Helier Electoral District no.4.
With the Vingtaine du Mont à l'Abbé and the Vingtaine du Rouge Bouillon, which form St Helier Electoral District no. 3 the electors return four Deputies to the States of Jersey.
The Parish Assembly of St Helier elects one Vingtenier, three Constable's Officers and two Roads Inspectors to represent the vingtaine for a term of three years.