Blunham is a village and civil parish in the Central Bedfordshire district of Bedfordshire, England, about 8 miles (13 km) east of Bedford. At the 2011 census date its population was 946. The River Ivel forms the parish's eastern boundary in places and the River Great Ouse its western and northern boundaries. The village is just over 0.6 miles (1 km) to the west of the A1 road, and Route 51 of the National Cycle Network passes to the south.

At the north of village is an unusual double humpback bridge across the River Ivel and the Mill Stream which must be crossed to enter the village from the A1 road or Tempsford.

The village school is notable for its thatched roof.

A mill at Blunham is mentioned in the Domesday Book of 1086. There has been a mill on the island between the Ivel and its millstream near the Blunham twin bridges for many years. It fell into disuse between 1898 and 1910 and was converted into a private dwelling.

Blunham river bridge carries the road to Tempsford over the River Ivel. Though of typical medieval style it is probably of 17th-century origin. It was adopted as a county bridge in 1839. There are five rounded sandstone arches and a later parapet of red bricks. The coping in vitrified brick and stone is dated 1866. The parapet was increased in height in 1893 and the coping reused. The original parapet can be seen from the river on the northern face. The upstream (southern) piers have triangular cutwaters. Probably higher originally, they would have formed pedestrian refuges. The refuges were in-filled and the cutwaters capped with half-pyramid shaped stones when the parapet was raised. A well-preserved paved stone invert was found under the easternmost arch during repair works in 1992.

The single span plate girder Ivel Navigation bridge of five curved cast iron beams resting on abutments of large sandstone blocks was built in 1823. A pair of ties at right angles to the carriageway hold the beams together. The deck is formed by iron plates resting on top of the girders. Moreton and Kinman of the Vulcan Foundry, Biggleswade was the manufacturer and their name plate is bolted to the west abutment below the south girder. The iron railings date from 1992 and are replicas of the originals.