Available Themes

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• Total Population 1801 to 1961: Population grew from 426 in 1801 to 29,575 in 1961.
• Occupational Structure in 1831: Out of 281 males aged 20 and over, 75 were Agricultural Labourers.
• Occupational Structure in 1881:

Here we are presenting statistics for a historical unit, which may have changed its boundaries significantly during the period covered.

Alternative names

The following alternative names exist:

Name	Status	Language	Start	End	Authority
LLANWYNNO	Preferred	English			M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 142.
LLANWONNO	Alternate	English			1851 Census of Great Britain, Table [1], 'Population Abstract'.
LLANWONNO INCLUDING MOUNTAIN ASH	Alternate	English			1871 Census of England and Wales, Table 4, 'Area; Houses and Inhabitants, 1861 and 1871, in the Parishes and Places comprised in each Superintendent Registrar's District'.

Unit associations

This unit was associated with the following other units:

Nature of association	Other unit involved	Type of unit	Authority
was succeeded by	ABERCYNON EP	Ecclesiastical Parish	M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 2.

Unit history

This unit was part of the following units:

Name	Type	Start	End	Authority
GLAMORGAN	Ancient County			M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 142.
MERTHYR TIDVIL RegD/PLU	Poor Law Union/Reg. District		1862	1851 Census of Great Britain, Table [1], 'Population Abstract'.
PONTYPRIDD RegD/PLU	Poor Law Union/Reg. District	1862		1911 Census of England and Wales, Table 5, 'Registration Counties, Districts and Sub-districts with their constituent civil parishes. - Urban or Rural District in which each parish is situated; Area; families or separate occupiers, and population, 1901 and 1911; and population enumerated in Institutions, large establishments, and on vessels, &c., 1911'.
EGLWYSILAN	Registration sub-District			1911 Census of England and Wales, Table 5, 'Registration Counties, Districts and Sub-districts with their constituent civil parishes. - Urban or Rural District in which each parish is situated; Area; families or separate occupiers, and population, 1901 and 1911; and population enumerated in Institutions, large establishments, and on vessels, &c., 1911'.
LLANWONNO	Registration sub-District			1911 Census of England and Wales, Table 5, 'Registration Counties, Districts and Sub-districts with their constituent civil parishes. - Urban or Rural District in which each parish is situated; Area; families or separate occupiers, and population, 1901 and 1911; and population enumerated in Institutions, large establishments, and on vessels, &c., 1911'.
MEISGYN Cmt	Ancient District			M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 142.
MISKIN Hundred	Ancient District			M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 142.
MOUNTAIN ASH UD	Local Government District			M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 142.
MOUNTAIN ASH USD	Sanitary District			1891 Census of England and Wales, Table 4, 'Area and Population in Rural Sanitary Districts'.
PONTYPRIDD RSD	Sanitary District			1891 Census of England and Wales, Table 4, 'Area and Population in Rural Sanitary Districts'.
PONTYPRIDD USD	Sanitary District			1891 Census of England and Wales, Table 4, 'Area and Population in Rural Sanitary Districts'.
PONTYPRIDD	Registration sub-District			1881 Census of England and Wales, Table 4, 'Area, Houses, and Population of Civil Parishes in the several Registration Sub-Districts in 1871 and 1881'.
YSTRADYFODWG USD	Sanitary District			1891 Census of England and Wales, Table 4, 'Area and Population in Rural Sanitary Districts'.

Boundary changes

This unit was affected by the following changes:

Date	Type of change	Other unit involved	Area transferred	Authority
31 Dec 1894	was enlarged by gaining part of	ABERDAR AP/CP	Houses in 1901: 756.	1901 Census of England and Wales, Table 14, 'Changes in the Boundaries of Civil Parishes, effected Local Government Acts of 1899 and 1894, and by Local Acts since 1891 - Inhabited Houses and Population 1901'.; LGBO 32001 (Appointed day, 1894)
31 Dec 1894	was enlarged by gaining part of	LLANFABON CP/AP	Houses in 1901: 68.	1901 Census of England and Wales, Table 14, 'Changes in the Boundaries of Civil Parishes, effected Local Government Acts of 1899 and 1894, and by Local Acts since 1891 - Inhabited Houses and Population 1901'.; LGBO 32001 (Appointed day, 1894)
31 Dec 1894	was reduced to create	PONT Y PRIDD CP	Houses in 1901: 1560.	1901 Census of England and Wales, Table 14, 'Changes in the Boundaries of Civil Parishes, effected Local Government Acts of 1899 and 1894, and by Local Acts since 1891 - Inhabited Houses and Population 1901'.; LGBO 32001 (Appointed day, 1894)
31 Dec 1894	was reduced to enlarge	RHONDDA AP/CP	Houses in 1901: 2111.	1901 Census of England and Wales, Table 14, 'Changes in the Boundaries of Civil Parishes, effected Local Government Acts of 1899 and 1894, and by Local Acts since 1891 - Inhabited Houses and Population 1901'.; LGBO 32001 (Appointed day, 1894)

Lower level units

This unit contained the following units:

Name	Type	Start	End	Authority
GLYNCYNON Tn	Parish-level Unit			M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 77.
HAFOD DDREINIOG Tn	Parish-level Unit			M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 86.