Dempster family name history and map
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Dempster in 1911 Ireland
The 1911 Census recorded 399 people named Dempster in Ireland; roughly one in every 11,000 people carried the name. The name was split fairly evenly between men and women: 206 men and 192 women. (A small number, 1, had no sex recorded.)
Counties with Dempster in Ireland
The Dempsters were heavily concentrated in Down, home to 57.4% of them (229 people). Next came Antrim (142), Dublin (7), Laois (7) and Longford (6).

Dempster average age in 1911
The average Dempster in 1911 was 26.4 years old, 24.0 for men and 29.0 for women; noticeably younger 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.
Dempster literacy in 1911
Of the Dempsters whose literacy was recorded, 79.3% could both read and write, 3.7% could read but not write, and 17% could do neither. The figures were much the same for men and 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.
Dempster common first names
The most common male names were John (32), James, William, Robert and Samuel. For women it was Mary (16), followed by Jane, Sarah, Agnes and Elizabeth.
Dempster occupations in 1911
The most common entry on a Dempster's census form was "Scholar"; 21.8% (87) were children at school. Among the rest, the most common occupations were textile worker (8%), general labourer (7.3%), farmer (6%) and farm labourer (4%). Grouped by sector, agriculture accounted for 11.3% of all Dempsters, followed by textiles & clothing, general labourers and retail & commerce.
What religion is Dempster?
Most Dempsters, 59.6%, were Presbyterian. The remainder were mostly Anglican (17%), Unitarian (11.8%), Roman Catholic (6.8%) and Methodist (0.8%).
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Pete F
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Dempster statistics (1911)
Number: 399
Rank: 1,580
Average Age: 26
Dempsterin the USA (2020)
Number: 2,366
Rank: 12,508
Note: If there were less than 100 in the USA census it will show as zero.
Ref: dempster
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