Baron Spens, of Blairsanquhar in the County of Fife, is a title in the Peerage of the United Kingdom.^[1] It was created on 20 August 1959 for the lawyer and Conservative politician Sir Patrick Spens. As of 2017^[update] the title is held by his great-grandson, the fourth Baron, who succeeded his father in 2001.

• (William) Patrick Spens, 1st Baron Spens (1885–1973)
• William George Michael Spens, 2nd Baron Spens (1914–1984)
• Patrick Michael Rex Spens, 3rd Baron Spens (1942–2001)
• Patrick Nathaniel George Spens, 4th Baron Spens (b. 1968)

The heir apparent is the present holder's son Hon. Peter Lathallan Spens (b. 2000)

• Kidd, Charles, Williamson, David (editors). Debrett's Peerage and Baronetage (1990 edition). New York: St Martin's Press, 1990.
• Leigh Rayment's Peerage Pages ^{[self-published source] [better source needed]}