Josiah Partridge (March 1805 – 27 November 1897) was a lawyer in the early days of the British Colony of South Australia.
He practised in Adelaide as a solicitor in partnership with James George Nash, and had a reputation for honest dealing.
He suffered a back injury from falling off his horse while commuting between Glenelg and Adelaide, and for many years he could not sit up, and around 1856 sold his business to Herford & Boucaut, the latter at the onset of an illustrious career that would see him Judge of the Supreme Court and Premier of the Colony.
Partridge married the eldest daughter of William Giles, of the South Australian Company.
He married Fanny Huckvale who died sometime before he embarked on Rajasthan for South Australia in July 1838.