The London Library is an independent lending library in London, established in 1841. Membership is open to all, on payment of an annual subscription, with life and corporate memberships also available. As of December 2023 the Library had around 7,500 members.
The Library was founded on the initiative of Thomas Carlyle, who was dissatisfied with some of the policies at the British Museum Library. It is located at 14 St James's Square, in the St James's area of the City of Westminster, which has been its home since 1845.