Hadlow was a merchant sailing ship built in 1814 at Quebec, British North America.

Hadlow was built for W. Parker & Co.; she was a two-deck full-rigged ship with a coppered hull, she was assessed at around 374 tons (bm).

[6] Having left London under the command of one Captain Davison on 27 May 1815,[9] Hadlow sailed from Cromarty, Scotland, to the Hudson Bay in June with 34 colonists from Stromness and possibly Loch Eriboll.

[9] Described as "new built", Hadlow sailed from London for Bengal, India via Madeira, Portugal in February 1817 under the command of Captain Edward Lamb.

She sailed to Woolwich, Kent on 30 July and took 50 male convicts from the prison hulk Justitia on 1 August.

Hadlow departed from Sheerness for New South Wales on 22 August under the command of Captain John Craigie.

[b][18][19] A woman who had been taken on board at the Cape of Good Hope gave birth to a stillborn child shortly after arrival at Port Jackson and subsequently died.

[24] She returned from Batavia in October 1820 in company with Earl St. Vincent, Mangles and Neptune; between them the four ships had brought 603 convicts to Port Jackson.