1821 Census of Ireland, Abstracts of the Answers and Returns Made pursuant to an Act of the United Parliament, passed in the 55th Year of the Reign of His Late Majesty George the Third, Intituled, "An Act for taking an Account of the Population of Ireland, and for ascertaining the Increase or "Diminution thereof.": Preliminary Observations. Enumeration Abstract. Appendix., Table [2] : " Ages of Persons".

Show top level table	Mayo	Show Ireland Dep table

Click on the unit name for its home page If appears click for more detailed statistics		Ages of Persons
		5 and Under. [1]	5 To 10. [2]	10 To 15. [3]	15 To 20. [4]	20 To 30. [5]	30 To 40. [6]	40 To 50. [7]	50 To 60. [8]	60 To 70. [9]	70 To 80. [10]	80 To 90. [11]	90 To 100. [12]	100 and Upwards. [13]	Unascertained. [14]	TOTAL. [15]
Mayo IrlC Total		46,711	42,231	35,703	36,214	50,011	33,419	21,012	17,254	6,981	2,314	445	66	47	704	293,112
Burrishoole IrlBarony		5,122	4,928	4,024	4,060	5,520	3,558	2,258	1,885	868	275	55	15	7	8	32,583
Carra IrlBarony		6,644	5,743	5,070	5,649	6,942	4,784	3,032	2,053	579	193	39	6	8	382	41,124
Clanmorris IrlBarony		2,831	2,717	2,349	2,467	3,117	2,353	1,495	1,015	327	105	17	3	1	26	18,823
Costello IrlBarony		5,660	4,781	4,085	3,975	5,482	3,761	2,237	1,821	784	215	36	5	5	4	32,851
Erris IrlBarony		2,970	2,724	2,139	2,121	3,127	2,084	1,089	1,064	387	131	23	5	6	9	17,879
Gallen IrlBarony		5,575	5,127	4,091	4,548	5,624	3,805	2,357	2,202	795	297	45	2	5	22	34,495
Kilmaine IrlBarony		4,608	4,065	3,422	3,327	5,281	3,559	2,366	1,810	808	274	58	7	2	227	29,814
Murrisk IrlBarony		4,236	3,866	3,249	2,863	4,543	2,635	2,040	1,688	920	292	75	10	7	5	26,429
Tirawley IrlBarony		9,065	8,280	7,274	7,204	10,375	6,880	4,138	3,716	1,513	532	97	13	6	21	59,114

Click on the triangles for all about a particular number.

Comments:

1	This table provides data for all Provinces, Counties and Baronies, but Parishes were included only wirhin Cities.

This website does not try to provide an exact replica of the original printed census tables, which often had thousands of rows and far more columns than will fit on our web pages. Instead, we let you drill down from national totals to the most detailed data available. The column headings are those that appeared in the original printed report. The numbers presented here, which are the same ones we use to create statistical maps and graphs, come from the census table and have usually been carefully checked.

The system can only hold statistics for units listed in our administrative gazetteer, so some rows from the original table may be missing. Sometimes big low-level units, like urban parishes, were divided between more than one higher-level units, like Registration sub-Districts. This is why some pages will give a higher figure for a lower-level unit: it covers the whole of the lower-level unit, not just the part within the current higher-level unit.

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