Saint-Laurent-d'Olt (French pronunciation: [sɛ̃ loʁɑ̃ dɔlt], literally Saint-Laurent of Olt; Occitan: Sant Laurenç d'Òlt) is a commune in the Aveyron department in southern France.

Situated on the D988 departmental road, roughly equidistant between the towns of Millau, Rodez and Mende, and 3.5 km west of the A75 autoroute, Saint-Laurent-d'Olt is perched on a rocky ridge above the river Lot, at about 584 metres above sea level.

The upper valley of the Lot divides the volcanic plateau of the Aubrac from the limestone plateaux of the Grands Causses.

In order to preserve the biodiversity of the area, the upper Lot valley between Espalion and Saint-Laurent-d'Olt is gazetted as part of the Natura 2000 network.

As well as providing services for the surrounding district, the village is home to an Institut Médico-Educatif, which is a residential school for children with intellectual handicaps, aged 6–20.