| Basque Country | Alava | Bizkaia | Gipuzkoa | |||||
| Number | Average size | Number | Average size | Number | Average size | Number | Average size | |
| First nucleus | 596,0 | 2,92 | 83,2 | 2,95 | 322,5 | 2,90 | 190,3 | 2,94 |
| Childless married couple | 186,4 | 2,00 | 25,9 | 2,00 | 99,3 | 2,00 | 61,2 | 2,00 |
| Married couple with children | 334,6 | 3,59 | 48,2 | 3,60 | 181,0 | 3,55 | 105,4 | 3,62 |
| Father with children | 11,7 | 2,37 | 1,8 | 2,42 | 6,8 | 2,35 | 3,1 | 2,38 |
| Mother with children | 63,4 | 2,39 | 7,3 | 2,47 | 35,4 | 2,37 | 20,7 | 2,35 |
| Second and third nucleus | 31,1 | 2,66 | 2,8 | 2,64 | 16,2 | 2,60 | 12,1 | 2,77 |
| Childless married couple | 6,6 | 2,00 | 0,4 | 2,00 | 3,4 | 2,00 | 2,8 | 2,00 |
| Married couple with children | 17,5 | 3,52 | 1,2 | 3,60 | 9,3 | 3,40 | 7,0 | 3,67 |
| Father with children | 0,9 | 2,18 | 0,2 | 2,00 | 0,6 | 2,13 | 0,1 | 2,50 |
| Mother with children | 6,0 | 2,25 | 1,0 | 2,28 | 2,9 | 2,22 | 2,2 | 2,29 |
Date Februay 26, 2008
Source: EUSTAT. Demographic survey, 2006.
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