The Cullen Viaduct is a former single-track railway viaduct at the Moray Firth in Cullen, Moray, Scotland. Containing eight arches, it formerly carried the Great North of Scotland Railway line between Portsoy in Aberdeenshire and Elgin in Moray. Crossing the Burn of Cullen and the A98, it was built as a result of a refusal by Seafield Estate, to the south, to have the line encroach on its land.

Work on the viaduct was completed in 1886, under the guidance of engineer P. M. Barnett; it is now a Grade B listed structure.

The line closed in 1968, and the viaduct is now used as a recreational path, part of the Moray Firth Trail and the Sustrans national cycle path.

Three other structures are located further to the east: a single span connecting North Deskford Street to the main road, a four-arch viaduct spanning North Castle Street and a four-arch bridge at the foot of Seafield Street (part of the A98), under which vehicles and pedestrians pass.

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  Seafield Street (the A98)
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  Above Cullen Golf Links
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  Castle Terrace (also the A98)