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• Total Population 1881 to 1971: Population fell from 437 in 1881 to 258 in 1971.
• 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
DEYTHUR	Preferred	Welsh			M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 138.
LLANSANFFRAID DEUDDWR	Preferred	English			M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 138.
LLANDANTFFRAID DEUDDWR	Alternate	English			1921 Census of England and Wales, Table 3, 'Population, Acreage, Private Families and Dwellings'.
LLANSAINTFFRAID DEYTHUR	Alternate	English			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'.
LLANSANTFFRAID	Alternate	English			1831 Census of Great Britain, Table [1], 'Population Abstract'.
LLANSANTFFRAID DEYTHUR	Alternate	English			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'.

Unit associations

We know of no associations with other units.

Unit history

This unit was part of the following units:

Name	Type	Start	End	Authority
MONTGOMERYSHIRE	Ancient County			M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 138.
LLANFYLLIN RegD/PLU	Poor Law Union/Reg. 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'.
DEUDDWR Hundred	Ancient District			M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 138.
DEUDDWR Cmt	Ancient District			M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 138.
LLANFYLLIN RD	Local Government District			M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 138.
LLANFYLLIN RSD	Sanitary District			1891 Census of England and Wales, Table 4, 'Area and Population in Rural Sanitary Districts'.
LLANSANTFFRAID	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'.
LLANSANFFRAID YM MECHAIN AP/CP	Parish-level Unit		by 1891	1861 Census of England and Wales, Table 1, 'Area; Houses and Inhabitants, 1851 and 1861, in Districts, Sub-districts, Parishes and Places'.

Boundary changes

We know of no boundary changes affecting this unit.

Lower level units

This unit contained the following units:

Name	Type	Start	End	Authority
CEFNLLENYDD ExP/Tn	Parish-level Unit			M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 38.
COLLFRYN Tn	Parish-level Unit			M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 47.
LLANNERCHCILA Tn	Parish-level Unit			M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 134.
TREDDERWEN FAWR Tn	Parish-level Unit			M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 206.
TREWYLAN Tn	Parish-level Unit			M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 215.