| Classification | Cru Classe |
| Type | Red |
| Producer | Chateau Margaux |
| Vintage | 1986 |
| Country | France |
| Main region | Bordeaux |
| Region | Margaux |
| Grape | Cabernet Sauvignon, Merlot, Bordeaux Blend |
| Volume | 0,75 |
| Condition | Perfect |
| Label | Slightly bin stained |
| Drinkable | -2050 |
| Stock | 0 |
| Condition | Perfect |
| Label | Slightly bin stained |
| Condition | Perfect |
| Label | Slightly damaged |
Château Margaux 1986 is a red grand vin from the Margaux appellation, which is part of Médoc; it is a First Growth bottled by Château Margaux. It was a vintage led by Cabernet Sauvignon, and 1986 was a Cabernet year on the whole Left Bank.
Budbreak began late, and flowering proceeded normally, but this was followed by a hot, sunny, and extremely dry summer. This led to prolonged drought stress, and by early September, most of the vines had ceased vegetative growth. Rain fell in the middle of the month, and a massive storm that followed caused flooding in some areas of Bordeaux, diluting the concentration of Merlot in the process. The patient growers were rewarded. The harvest began on 23 September, and the following three weeks were hot, sunny, and windy, conditions that were nearly ideal for the late-ripening Cabernet Sauvignon variety grown on gravelly soil.
The harvest was bountiful, yielding at least 15% more than in 1985. Despite the bumper crop, and thanks to the very well-ripened, thick-skinned Cabernet grapes, this wine has a solid structure. The 1986 Château Margaux has long been described as a wine meant for long-term aging, and a taste of the wine reveals why.