Sir Forgannwg (etholaeth seneddol)

Roedd Sir Forgannwg yn etholaeth seneddol i Dŷ'r Cyffredin yn Senedd y Deyrnas Unedig o 1536 hyd at 1885.
 Aelodau Seneddol 
 1541-1832 
BlwyddynAelod 1541Syr George Herbert 1545 anhysbys 1547 John Thomas Bassett 1553  George Mathew 1553  Anthony Mansell 1554  Edward Mansell 1554   Syr Edward Carne 1555anhysbys 1558 William Herbert I 1559 William Herbert I 1562/3 William Bassett 1571 William Bassett 1572 William Herbert II 1577 William Mathew|-
| 1584|| Robert Sidney
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| 1586|| Thomas Carne
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| 1588|| Thomas Carne
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| 1593|| Syr Robert Sidney
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| 1597|| Syr Thomas Mansell
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| 1601 || Syr John Herbert	 
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| 1604 || Philip Herbert
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| 1605 || Syr Thomas Mansell
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| 1614 || Syr Thomas Mansell
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| 1621 || William Price
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| 1624 || Syr Robert Mansell
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| 1625 || Syr Robert Mansell
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| 1626  || Syr John Stradling
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| 1628 || Syr Robert Mansell
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| 1640  || Syr Edward Stradling
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| 1640  || Philip Herbert
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| 1653 || Dim cynrychiolaeth'' 1654  Philip Jones   Edmund Thomas 1656  Philip Jones   Edmund Thomas   1659   Evan Seys 1660  Syr Edward Mansel 1661 William Herbert 1670 Syr Edward Mansel 1679 Bussy Mansel1681  Syr Edward Mansel1689 Bussy Mansel1699  Thomas Mansel, Barwn 1af Mansel1712  Robert Jones1716 Syr Charles Kemeys1734 William Talbot1737Bussy Mansel1745Thomas Mathews1747 Charles Edwin1756Thomas William Mathews1761 Syr Edmund Thomas1767Richard Turbervill1768 George Venables-Vernon1780Charles Edwin1789–1814 Thomas Wyndham1814 Benjamin Hall1817 Syr Christopher Cole1818 John Edwards1820 Syr Christopher Cole1830Christopher Rice Mansel Talbot

  1832-1885 
BlwyddynAelodPlaidAelodPlaid 1832 Christopher Rice Mansel Talbot Rhyddfrydol Lewis Weston Dillwyn Rhyddfrydol 1837 Edwin Wyndham-Quin Ceidwadol 1851 George Tyler Ceidwadol 1857 Henry Hussey Vivian Rhyddfrydol 1885 ''Diddymu'r etholaeth

Etholiadau
Bu dim ond dri etholiad cystadleuol yn Sir Forgannwg rhwng y Ddeddf Diwygio Mawr ym 1832 a diddymu'r etholaeth ym 1885 sef etholiadau 1837, 1857 a 1874:

Cyfeiriadau

 Wales at Westminster James, Arnold J a Thomas John E Gwasg Gomer 1981

Categori:Etholaethau hanesyddol yng Nghymru
Categori:Morgannwg