Viaduc du Blanc, Railway viaduct in Le Blanc, France.

Viaduc du Blanc is a 528-metre stone railway viaduct over the Creuse, 38 metres high and 4.5 metres wide, with 21 semicircular arches. Its low parapet runs along the flat top, and the light-coloured masonry stands above the town of Le Blanc.

Construction of the viaduct began in 1885 and was completed in 1886, designed by the architects Bleynie, Charles Dupuy and Bonnemère. It carried a single track of the Saint-Benoît au Blanc line across the Creuse, between the stations of Saint-Aigny - Le Blanc and Le Blanc. The work cost 2,210,000 francs of the period. Rail traffic ceased in 1990.

The viaduct carried trains of the Saint-Benoît au Blanc line over the Creuse on a single track until rail traffic ceased in 1990. It is now laid out as a greenway, so walkers and cyclists cross the 528-metre deck on the former trackbed. The structure is named simply after the town of Le Blanc, in the Indre department.

Rail traffic on the Saint-Benoît au Blanc line ended in 1990, and the deck is now laid out as a greenway for walkers and cyclists. The crossing is 528 m long and 4.5 m wide, with a low parapet along the flat top; the Creuse flows 38 m below.

Rail traffic stopped in 1990, and the deck now carries the Voie verte des Vallées, a walking and cycling path. The 1885–1886 work cost 2,210,000 francs of the time and used 43,000 m³ of stone. The architects were Bleynie, Charles Dupuy and Bonnemère.