Blenheim Farm is a 1-hectare (2.5-acre) nature reserve near Charlbury in Oxfordshire.

It is owned and managed by the Berkshire, Buckinghamshire and Oxfordshire Wildlife Trust.

[1] This is a meadow surrounded by ancient hedges and woodland.

Flora include common knapweed, lady's bedstraw, cowslip and ragged-robin, while there are butterflies such as the common blue and orange tip.

Amphibians include common frogs, common toads and smooth newts.