| Honorific-Prefix: | The Right Honourable |
| Sir Joshua Williams | |
| Order: | 1st chairman of the board of Governors of Canterbury College |
| Term Start: | 9 July 1873 |
| Term End: | 1875 |
| Predecessor: | new office |
| Successor: | Henry Barnes Gresson |
| Birth Date: | 19 September 1837 |
| Birth Place: | London, England |
| Death Place: | Hove, Sussex, England |
Sir Joshua Strange Williams (19 September 1837 - 22 December 1915) was a New Zealand lawyer, politician, Supreme Court judge and university chancellor.
Williams was born in London, England in 1837, the eldest son of the late Joshua Williams, Q.C., author of treatises on the law relating to real and personal property and other works, by his marriage with Lucy, daughter of William Strange, of Upton. Williams was educated at Harrow and Trinity College, Cambridge, where he graduated B.A. (Chancellor's Medallist for legal studies, first class law tripos, third class mathematical tripos) in 1859, M.A. in 1862, and LL.M. in 1870. Williams entered at Lincoln's Inn in January 1857, and was called to the English Bar in November 1859.
He arrived in Dunedin, New Zealand in 1861 on the Derwentwater, moved to Christchurch almost immediately, and in the following year went into partnership with Thomas Smith Duncan, then provincial solicitor, an office which he himself subsequently held for several years.
Williams sat in the Canterbury Provincial Council representing the Heathcote electorate in 1862 and 1863 and from 1866 to 1871. He was on the provincial executive council in 1863, in 1866, and in 1867–1868. On 9 July 1873 at the first meeting of the Board of Governors of the Canterbury College, he was voted chairman after Charles Bowen had declined the role in advance of the meeting. Williams held the chairmanship until 1875, when he moved to Otago.
In January 1871 he gave up practice and was land registrar of the Canterbury district until 1872 and Registrar-General of Land for the whole of New Zealand from the latter year until 1875, in which year he was appointed puisne judge for Otago. He was created a knight bachelor in the 1911 Coronation Honours.
He married first, in 1864, Catherine Helen, daughter of Thomas Sanctuary, of Horsham, Sussex; and secondly, in 1877, Amelia Durant, daughter of John Wesley Jago, of Dunedin.
| Motto: | Deo Adjuvante Non Timendum [1] |