Diffley family name history and map
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Diffley in 1911 Ireland
The 1911 Census recorded 187 people named Diffley in Ireland; roughly one in every 23,000 people carried the name. The name was split fairly evenly between men and women: 97 men and 89 women. (A small number, 1, had no sex recorded.)
Counties with Diffley in Ireland
Roscommon was Diffley country: 49.2% of them (92 people) lived there in 1911. Next came Leitrim (41), Longford (26), Carlow (8) and Dublin (6).

Diffley average age in 1911
The average Diffley in 1911 was 31.4 years old, 33.2 for men and 29.5 for women; slightly older than the national averages of 29.6 for men and 30.5 for women. That low figure reflects just how many children there were in Edwardian Ireland, along with high infant mortality and the limits of public health at the time. For comparison, average life expectancy in Ireland today is around 83.
Diffley literacy in 1911
Of the Diffleys whose literacy was recorded, 78% could both read and write, 3.8% could read but not write, and 18.1% could do neither. Men came out slightly ahead, 79.2% reading and writing against 76.7% of women. Bear in mind these figures include young children; the census itself only counted people aged nine and over when calculating illiteracy, on the grounds that it was unfair to label a child illiterate before they'd had a chance to learn.
Diffley common first names
The most common male names were John (15), Patrick, Michael, Thomas and Peter. For women it was Mary (14), followed by Bridget, Annie, Kate and Ellen.
Diffley occupations in 1911
The most common occupation among Diffleys was farmer, 31% of them (58 people). Next came scholar / student (21.4%), farm labourer (5.9%), agent / manager (1.1%) and retired / pensioner (1.1%). Grouped by sector, agriculture accounted for 36.9% of all Diffleys, followed by retail & commerce, building & construction and retired & pensioners.
What religion is Diffley?
Diffleys were overwhelmingly Roman Catholic, 99.5% of them.

Visitor Notes
Review type for post source and surnames source type not found
Added by
Pete F
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Diffley statistics (1911)
Number: 187
Rank: 2,609
Average Age: 31
Diffley in the USA (2020)
Number: 549
Rank: 42,533
Note: If there were less than 100 in the USA census it will show as zero.