The road was built between 1829 and 1835 and is named after the reigning monarch of the time, King William IV.
King William Street is mentioned in T. S. Eliot's poem The Waste Land.
Lines 60–68 read: Unreal City, Under the brown fog of a winter dawn, A crowd flowed over London Bridge, so many, I had not thought death had undone so many.
Sighs, short and infrequent, were exhaled, And each man fixed his eyes before his feet.
Flowed up the hill and down King William Street, To where Saint Mary Woolnoth kept the hours With a dead sound on the final stroke of nine.