Blantyre Monument is a commemorative stone in Erskine, Renfrewshire. The monument is in the obelisk style. It is situated adjacent to the B815 road; in a field on the border with Bishopton.

The monument was built to commemorate the bravery of Robert Walter Stuart, the 11th Lord Blantyre, who lived at nearby Erskine House (now Mar Hall). He was a Major-General in the British Army and served in the Napoleonic Wars with the Duke of Wellington. He was killed accidentally by a stray bullet in a street fight in Brussels in 1830. The monument was planned by friends who held him in high esteem. William Burn was the designer. It was constructed in c.1825 and became a category B listed monument on 27 June 1980.

The following passage is inscribed on the monument:

Erected by the county of Renfrew
to the memory of the right honorable
Robert Walter 11th Lord Blantyre

A Major-General in the British Army
and formerly Lord Lieutenant of
Renfrewshire

In testimony of respect for his
public services and as a tribute
of esteem of his private worth

• Robert Stuart, 11th Lord Blantyre
• List of listed buildings in Erskine, Renfrewshire