Arthur Guinness (12 March 1768 – 9 June 1855) was an Irish brewer, banker, politician and flour miller active in Dublin, Ireland.

On his father's death in January 1803, he and his brothers Benjamin and William Lunell created a partnership trading as: "A.

[5] By 1837 the young Benjamin Disraeli mentioned that he had: ".. supped at the Carlton.. off oysters, Guinness and broiled bones".

In the background Arthur's brewery benefited hugely until the 1830s from the difference between the malt tax levied in Britain and Ireland, easing his higher-value exports to Britain, and so Arthur became more of a supporter of the union as it was in the 1830s, having been a supporter of Grattan's form of home rule in his youth.

[6] By his death in 1855, St James's Gate was brewing and selling 78,000 hogsheads annually, equivalent to 4,212,000 gallons.

Due to the halving of brewery sales in 1815–20 down to a million gallons a year, the partnership relied on profits from its flour mills during the Post-Napoleonic depression.

[10] He was also chairman of the Dublin Chamber of Commerce, elected unanimously from 1826 to 1855, and was a member of the Ouzel Galley Society that provided arbitration in business disputes.

In 1814, Arthur joined his brother Hosea in applying for a grant to use the arms of the Gaelic Magennis clan from County Down, as their father had used them from 1761.

[14][15] Thereafter his third son Benjamin managed the brewery from 1839 with the Purser family, with Arthur, by now aged 70, involved only with the larger decisions.

On the approach to the 1798 rebellion he deplored both official and rebel violence, and assumed that the solution would be Catholic Emancipation with universal suffrage.

But from the late 1830s the O'Connells lost all interest in brewing when Father Mathew started his temperance crusade.

During the Great Famine of the 1840s, Arthur called on his son Benjamin to donate to the starving, adding that: This was in contrast to O'Connell, who spoke in sympathy, but achieved so little for the poor.

Having established a huge growth in exports Arthur retired to Torquay in the 1840s, with occasional visits to Dublin.