Sir Walter Calverley-Blackett, 2nd Baronet (18 December 1707 – 14 February 1777) was a baronet and a member of the British House of Commons representing Newcastle-upon-Tyne.

As Walter Calverley he was the son of Sir Walter Calverley, 1st Baronet and Julia Blackett, daughter of Sir William Blackett. In 1728 he inherited the substantial estates of his uncle Sir William Blackett, 2nd Baronet at Allendale, Northumberland and Cambo on condition that he married Elizabeth Orde (his uncle's natural daughter) and changed his name to Blackett. The marriage took place in August 1729.

He was High Sheriff of Northumberland in 1731 and Member of Parliament for Newcastle-upon-Tyne from 1734 to 1777.He was a Freeman and Alderman of the City of Newcastle and Mayor of that City five times, in 1735, 1748, 1756, 1764 and 1771.

He owned a mansion in the city at Pilgrim Street, Newcastle. On succession to the Baronetcy of Calverley and Esholt on the death of his father in 1749 he inherited estates at Calverley and Esholt, Yorkshire, which he soon sold. He settled at Cambo, and expended considerable sums on improvements to Wallington Hall, Cambo which he remodelled in Palladian style to designs by architect Daniel Garrett. In 1755 he also commissioned Garrett to build a folly in the style of a medieval castle ( see Rothley Castle) on the hillside above Wallington.

His children all predeceased him and the Baronetcy became extinct on his death. His estates passed to the Trevelyan family into which his sister Julia had married.