John Bowes, 10th Earl of Strathmore and Kinghorne (14 April 1769 – 3 July 1820) was a Scottish nobleman and peer.

He had a long affair with the commoner Mary Milner, the beautiful daughter of a gardener; according to some versions (notably offered by Augustus Hare) he went through a false ceremony of marriage with her.

But this deathbed marriage did not prevent his primary title from being inherited by his younger brother Thomas Lyon-Bowes, 11th Earl of Strathmore and Kinghorne.

A bitter court case followed over the terms of the Earl's will, and after five years, it was decided that the Earl's son John would inherit his English estates, including Gibside, Streatlam Castle and St Paul's Walden Bury, while his brother would inherit the Scottish estates.

Mary, now Dowager Countess of Strathmore, married in 1831 her son's tutor William Hutt, and died in 1860.