Passenham is a small village in the civil parish of Old Stratford in south-west Northamptonshire, England.

It is just north of the River Great Ouse, which forms the boundary with Buckinghamshire, and close to (but separated by the river from) Stony Stratford in Milton Keynes.

The church of St Guthlac has a late 13th-century tower, the upper part rebuilt 1626.

The chancel was built in 1626 by Sir Robert Banastre (who died in 1649).

Also notable are box pews, stained glass and a monument to Banastre.