Couples

Population aged 15 or over by sex, age and cohabitation situation
  2006 2018
  In a cohabiting union Not in a cohabiting union In a cohabiting union Not in a cohabiting union
  Males Females Males Females Males Females Males Females
15 - 19 25 629 67 755 2 009 538 1 877 949 25 618 49 414 2 021 900 1 886 324
20 - 24 355 523 636 266 1 605 738 1 310 024 307 147 495 119 1 532 281 1 294 269
25 - 39 4 000 006 4 427 298 2 107 622 1 754 286 3 624 355 4 154 155 2 149 669 1 819 795
40 - 54 4 806 700 4 780 015 1 480 905 1 744 780 4 579 703 4 519 053 1 740 279 1 955 904
55 - 64 2 722 686 2 503 428 675 987 1 049 245 2 891 710 2 819 664 1 034 436 1 411 798
65 - 79 2 542 102 2 200 217 667 289 1 883 463 3 208 088 2 834 058 931 091 1 981 202
80 and over 632 377 397 228 331 826 1 553 855 937 040 644 732 482 162 1 926 382
Total 15 085 023 15 012 207 8 878 905 11 173 602 15 573 661 15 516 195 9 891 818 12 275 674

Metropolitan France
Definition Insee of the couple (in the meaning of living in a couple, census survey) : A person is living in a couple if, at 14 or more, he or she answers yes to the question " Are you living in a union ? ". Introduced in the census individual form since 2004, this question imposes no condition on legal marital status or on the partner (he or she may live or not in the same dwelling, be or not of opposite sex).
Source: INSEE, exploitation of 2006 and 2018 census data

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Update: October 2021