This is an incomplete list of Acts of the Parliament of the United Kingdom for the year 1804. Note that the first parliament of the United Kingdom was held in 1801; parliaments between 1707 and 1800 were either parliaments of Great Britain or of Ireland). For Acts passed up until 1707 see List of Acts of the Parliament of England and List of Acts of the Parliament of Scotland. For Acts passed from 1707 to 1800 see List of Acts of the Parliament of Great Britain. See also the List of Acts of the Parliament of Ireland.
For Acts of the devolved parliaments and assemblies in the United Kingdom, see the List of Acts of the Scottish Parliament, the List of Acts of the Northern Ireland Assembly, and the List of Acts and Measures of Senedd Cymru; see also the List of Acts of the Parliament of Northern Ireland.
The number shown after each Act's title is its chapter number. Acts passed before 1963 are cited using this number, preceded by the year(s) of the reign during which the relevant parliamentary session was held; thus the Union with Ireland Act 1800 is cited as "39 & 40 Geo. 3 c. 67", meaning the 67th Act passed during the session that started in the 39th year of the reign of George III and which finished in the 40th year of that reign. Note that the modern convention is to use Arabic numerals in citations (thus "41 Geo. 3" rather than "41 Geo. III"). Acts of the last session of the Parliament of Great Britain and the first session of the Parliament of the United Kingdom are both cited as "41 Geo. 3". Acts passed from 1963 onwards are simply cited by calendar year and chapter number.
All modern Acts have a short title, e.g. "the Local Government Act 2003". Some earlier Acts also have a short title given to them by later Acts, such as by the Short Titles Act 1896.
44 Geo. 3
Continuing the second session of the 2nd Parliament of the United Kingdom, which met from 22 November 1803 until 31 July 1804.
Public general acts
| { { |Marine Mutiny Act 1804|public|20|09-03-1803|repealed=y|archived=n|An act for the regulation of his Majesty's royal marine forces while on shore.|note4= }}
| { { |Restriction on Cash Payments (Ireland) Act 1804|public|21|09-03-1803|repealed=y|archived=n|An act to continue, until three Months after any Restriction imposed by any Act of the present Session of Parliament on the Bank of England from issuing Cash in Payments shall cease, an Act, made in the Parliament of Ireland, in the thirty-seventh Year of the Reign of his present Majesty, for confirming and continuing the Restrictions on Payments in Cash by the Bank of Ireland, and also an Act made in the forty-third Year of the Reign of his present Majesty for amending the said Act.|note4= }}
| { { |Exportation Act 1804|public|22|09-03-1803|repealed=y|archived=n|An act to indemnify all Persons who have been concerned in issuing or carrying into Execution an Order of the Lords Commissioners of his Majesty's Treasury for permitting the Exportation of Seed Corn to Portugal from Great Britain.|note4= }}
| { { |Greenland Fishery Act 1804|public|23|09-03-1803|repealed=y|archived=n|An act for allowing Vessels employed in the Greenland Whale Fishery, and clearing out from any Port in Great Britain, to complete their full Number of Men at certain Ports for the present Season.|note4= }}
| { { |Payment of Creditors (Scotland) Act 1804|public|24|09-03-1803|repealed=y|archived=n|An act for further continuing, until the twenty-fifth Day of March One thousand eight hundred and six, an Act made in the thirty-third Year of the Reign of his present Majesty, for rendering the Payment of Creditors more equal and expeditious in Scotland.|note4= }}
| { { |Crown Lands at Byfleet, Weybridge, etc., Surrey Act 1804|public|25|09-03-1803|repealed=y|archived=n|An Act to enable His Majesty to grant the Inheritance, in Fee Simple, of certain Manors, Messuages, Lands and Hereditaments, in the Parishes of Byfleet, Weybridge, Walton, Walton Leigh, and Chertsey, in the County of Surrey, to His Royal Highness Frederick Duke of York and Albany, for a valuable Consideration.|note4= }}
| { { |Customs, Excise and Taxes Act 1804|public|26|23-03-1803|repealed=y|archived=n|An act for charging, until the twenty-fifth Day of March One thousand eight hundred and five, certain Rates and Duties, and for allowing certain Bounties and Drawbacks upon Goods, Wares, and Merchandize, imported into and exported from Ireland; and also for charging certain Inland Duties of Excise and Taxes in Ireland in lieu of former Rates, Duties, and Taxes, Bounties and Drawbacks.|note4= }}