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 [1] : " Summary of the Number of Houses and Inhabitants in the several Counties of Ireland, according to the Census of 1821; and of the Proportions of Houses and Inhabitants to the Acre and Square Mile in each County".

COUNTIES. Contents in Irish Plantation Acres. (a) Contents in Square Miles. Number of Houses in 1813. (b) Number of Houses in 1821. Increase of Houses between the Years 1813 & 1821. Average Number of Acres to each House. Average Number of inhabited Houses to a Square Mile. Number of INHABITANTS in 1813 (b) Number of INHABITANTS in 1821. Increase of INHABITANTS between the Years 1813 & 1821. Average Number of Acres to an Inhabitant. Average Number of Inhabitants to a Square Mile.
I. LEINSTER:
I. — Carlow 137,050 214 12,090 13,028 938 10 ½ 61 69,566 78,952 9,386 1 ¾ or 1.75 369
II. — Drogheda Town (c) – – 3,086 3,164 78 – – 16,123 18,118 1,995 – –
III. — Dublin County 142,050 221 16,633 20,791 – 4 161 3/11 110,437 150,011 – 2 ⅓ or 2.33 1,520
IV. — Dublin City (c) – – 15,104 14,949 – – – 176,610 185,881 9,271 – –
V. — Kildare 236,750 369 14,564 16,478 1,914 14 ⅜ 44 ⅔ 85,133 99,065 13,932 2 ⅖ or 2.40 268
VI. — Kilkenny County 300,350 469 23,414 25,949 2,535 10 63 ½ 134,664 158,716 24,052 1 ⅔ or 1.66 388
VII. — Kilkenny City (c) – – no return 3,840 – – – no return 23,230 – – –
VIII. — King's County 282,200 440 19,705 22,564 2,859 12 ½ 51 3/11 113,226 131,088 17,862 2 ⅙ or 2.16 298
IX. — Longford 134,150 209 16,348 18,987 2,639 7 90 3/10 95,917 107,570 11,653 1 ⅕ or 1.20 514
X. — Louth 110,750 173 no return 18,138 – 5 ⅕ 123 no return 101,011 – 1 1/14 or 1.07 688
XI. — Meath 327,900 512 25,921 27,942 2,021 11 5/7 54 ⅗ 142,479 159,183 16,704 2 or 2.00 311
XII. — Queen's County 235,300 367 19,932 23,105 3,173 10 ⅙ 63 113,857 134,275 20,418 1 5/7 or 1.71 366
XIII. — Westmeath 231,550 361 no return 23,015 – 10 63 ¾ no return 128,819 – 1 ⅚ or 1.83 357
XIV. — Wexford 342,900 535 no return 29,159 – 11 ⅔ 54 ⅔ no return 170,806 – 2 or 2.00 319
XV. — Wicklow 311,600 486 13,445 17,289 3,844 18 35 7/12 83,109 110,767 27,658 2 9/11 or 2.81 228
2,792,550 4,356 – 278,398 – 10 64 – 1,757,492 – 1 8/9 or 1.88 403
 
II. MUNSTER:
I. — Clare 476,200 744 29,301 35,373 6,072 13 ½ 47 4/7 160,603 208,089 47,486 2 3/10or 2.30 280
II. — Cork County 1,048,800 1,638 91,447 103,279 11,832 9 ⅙ 70 523,936 629,786 105,850 1 3/7 or 1.42 446
III. — Cork City (c) – – 7,652 11,180 – – – 64,394 100,658 – – –
IV. — Kerry 647,650 1,012 31,749 35,597 3,848 18 ⅕ 35 178,622 216,185 37,563 3 or 3.00 213
V. — Limerick County 386,750 604 17,897 35,201 – 9 ⅓ 70 ⅓ 103,865 218,432 – 1 ⅓ or 1.33 459
VI. — Limerick City (c) – – no return 7,208 – – – no return 59,045 – – –
VII. — Tipperary 554,950 867 50,224 55,297 5,073 10 63 ¾ 290,531 346,896 56,365 1 5/9 or 1.55 400
VIII. — Waterford County 262,800 410 19,342 20,189 847 11 58 119,457 127,842 8,385 1 ⅔ or 1.66 381
IX. — Waterford City (c) – – 3,581 3,671 90 – – 25,467 28,679 3,212 – –
3,377,150 5,275 – 306,995 – 11 58 ⅕ – 1,935,612 – 1 7/10 or 1.70 367
 
III. ULSTER:
I. — Antrim 387,200 605 42,258 46,661 4,403 7 ⅓ 78 ⅔ 231,548 262,860 31,312 1 5/13 or 1.38 447
II. — Armagh 181,450 283 21,944 36,260 – 5 128 121,449 197,427 – 9/10 or 0.90 697
III. — Carrickfergus Town (c) – – 1,166 1,367 201 – – 6,136 8,023 1,887 – –
IV. — Cavan 301,000 470 no return 34,148 – 8 ⅘ 72 ¾ no return 195,076 – 1 ½ or 1.50 415
V. — Donegal 679,550 1,061 no return 44,800 – 15 ⅙ 32 7/10 no return 248,270 – 2 ¾ or 2.75 234
VI. — Down 348,550 544 53,310 59,747 6,437 5 ⅘ 109 ⅘ 287,290 325,410 38,120 1 1/16 or 1.06 598
VII . — Fermanagh 283,450 448 19,291 22,585 3,294 12 ½ 50 ¼ 111,250 130,997 19,747 1 2/13 or 1.15 292
VIII. — Londonderry 318,500 479 31,287 34,691 3,404 9 ⅙ 72 ½ 186,181 193,869 7,688 1 ⅗ or 1.60 405
IX. — Monaghan 179,600 280 27,066 32,378 5,312 5 ½ 115 ½ 140,433 174,697 34,264 1 or 1.00 624
X. — Tyrone 463,700 724 46,213 47,164 951 1O 63 2/7 250,746 261,865 11,119 1 10/14 or 1.77 362
3,143,000 4,894 – 359,801 – 8 ¾ 73 ½ – 1,998,494 – 1 ⅗ or 1.60 408
 
IV. CONNAUGHT:
I. — Galway County 989,950 1,546 21,122 54,180 – 17 37 ⅔ 140,995 309,599 – 3 or 3.00 218
II. — Galway Town – – 3,353 3,957 604 – – 24,684 27,775 3,091 – –
III. — Leitrim (c) 255,950 400 17,899 21,762 3,863 11 ⅓ 54 ¼ 94,095 124,785 30,690 2 or 2.00 312
IV. — Mayo 790,600 1,235 43,702 53,051 9,349 14 ⅘ 43 237,371 293,112 55,741 2 ⅔ or 2.66 237
V. — Roscommon 346,650 541 30,254 37,399 7,145 9 ¼ 69 158,110 208,729 50,619 1 ⅗ or 1.60 385
VI. — Sligo 247,150 386 no return 27,059 – 9 ⅓ 70 no return 146,229 – 1 ⅔ or 1.66 37s
2,630,300 4,108 – 197,408 – 13 3/10 48 – 1,110,229 – 1 4/11 or 1.36 270
 
I. — LEINSTER 2,792,550 4,356 – 278,398 – 10 64 – 1,757,492 – 1 8/9 or 1.88 403
II.— MUNSTER 3,377,150 5,275 – 306,995 – 11 58 ½ – 1,935,612 – 1 7/10 or 1.70 367
III.— ULSTER 3,143,000 4,894 – 359,801 – 8 ¾ 73 ½ – 1,998,494 – 1 ⅗ or 1.60 408
IV.— CONNAUGHT 2,630,300 4,108 – 197,408 – 13 3/10 48 – 1,110,229 – 1 4/11 or 1.36 270
11,943,000 18,633 – 1,142,291 – 10 ½ 61 – 6,801,827 – 1 ¾ or 1.75 365

OBSERVATIONS.

(a) THE Contents of each County in Acres and Square Miles have been taken from Beaufort's Memoir of a Map of Ireland, as being (though not perfectly accurate) the latest and best account that pervades the whole Island.

(b) The letter d attached to the figures of a County in this column, denotes a deficiency of some of the returns of that County; no estimate, therefore, could be given of the increase or diminution of Houses and Inhabitants in these cases.

(c) The contents, and relative proportions of Houses, &c. of Drogheda Town are included in Louth County; those of Carrickfergus Town in Antrim County; and those of the other Counties of Cities and Counties of Towns in the Counties at large of the same name with themselves.

[The areas in acres for certain counties are] exclusive of Lough Neagh, the contents of which could not be included in the above Table, as not being entirely within the limits of any one County; it is computed by Beaufort to contain 58,200 acres, which, being added to the preceding total, will make the superficies of Ireland to contain 12,001,200 Irish acres.