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1. Average number of family members is 2.8 persons

Families are classified according to whether the spouses are married, cohabiting or in a registered partnership and whether they have children. In addition to this, there are one-parent families as a separate category. In this classification, no limit is set as to the age of a child. Families with underage children, defined as families having at least one child under the age of 18 living at home, are discussed in Section 3. Where families with underage children are concerned, parents are also referred to as supporters. In the following examination, one-parent families are not only single-supporter families, as a person having the status of a child living with his/her mother or father may be of any age.

At the end of 2015, there were 1,475,000 families in Finland. Their number grew by 1,700 from the year before. The increase was 900 lower than in the previous year.

Altogether 74 per cent of the Finnish population belongs to a family. The proportion has decreased by 0.2 percentage points from the previous year. The rate of its decrease has remained at this level since the beginning of the 1990s. The proportion of the family population was at its highest in the 1960s and 1970s, when 87 per cent of the population belonged to a family. The number of persons belonging to a family fell by 3,500 during 2015. The country's total population increased by 15,600 persons. At the end of 2015, the average size of a family in Finland was 2.8 persons.

Table 1. Family population and average size of family in 1950–2015

Year	Families total	Family population	Population	Proportion of family population, %	Average size of family
1950	930 572	3 457 474	4 029 803	85,8	3,7
1960	1 036 270	3 855 037	4 446 222	86,7	3,7
1970	1 153 878	3 986 005	4 598 336	86,7	3,5
1980	1 278 102	4 023 091	4 787 778	84,0	3,1
1990	1 365 341	4 101 922	4 998 478	82,1	3,0
2000	1 401 963	4 053 850	5 181 115	78,2	2,9
2010	1 455 073	4 065 168	5 375 276	75,6	2,8
2012	1 465 733	4 075 094	5 426 674	75,1	2,8
2013	1 471 085	4 081 903	5 451 270	74,9	2,8
2014	1 473 666	4 084 001	5 471 753	74,6	2,8
2015	1 475 335	4 084 544	5 487 308	74,4	2,8

The commonest family type in Finland is still a married couple without children, making up 36 per cent of all families in 2015. As recently as in 2004, the most common family type in Finland was a married couple with children of some age living at home. Twenty-nine per cent of all families were families of a married couple with children in 2015. The number of such families has been on the decline for a long time, whereas the number of married couples without children has been rising. The number of married couples living with their children decreased by 5,600 from the previous year, whereas in the early 2000s the figure still went down by over 10,000 per year.

The number and proportion of cohabiting couples among families is also growing. However, cohabiting couples without children still make up only 15 per cent of all families. Today, eight per cent of all families are cohabiting couples with children. The number and relative share of families with cohabiting couples have grown slowly in recent years.

"Mother and children" families represent ten per cent of all families. “Father and children” families are still rare; they number only two in one hundred. Their relative proportion has not changed much over the past few years.

Table 2. Families by type in 1950–2015

Year	Total	Married couple without children	Married couple with children	Cohabiting couple with children	Cohabiting couple without children	Mother and children	Father and children	Registered male couple 1)	Registered female couple   1)
1950	930 572	176 650	593 763	..	..	137 803	22 356	..	..
1960	1 036 270	207 897	678 822	..	..	129 706	19 845	..	..
1970 2)	1 153 878	260 562	722 001	6 800	19 100	126 394	19 021	..	..
1980 3)	1 278 102	302 818	711 226	36 200	65 900	140 725	21 233	..	..
1990	1 365 341	364 452	640 062	65 896	123 471	147 297	24 161	..	..
2000	1 401 963	436 019	514 868	102 581	160 132	159 432	28 931	..	..
2010	1 455 073	513 889	446 433	117 254	195 967	149 651	30 278	706	895
2011	1 460 570	518 550	442 257	118 054	200 171	149 196	30 534	773	1 035
2012	1 465 733	523 221	439 194	118 136	203 334	149 143	30 714	829	1 162
2013	1 471 085	525 933	434 571	120 040	208 264	149 110	30 955	905	1 307
2014	1 473 666	527 238	429 811	121 499	211 673	149 668	31 342	991	1 444
2015	1 475 335	528 539	424 185	121 657	215 620	150 274	31 452	1 023	1 585
%
1950	100,0	19,0	63,8	..	..	14,8	2,4	..	..
1960	100,0	20,1	65,5	..	..	12,5	1,9	..	..
1970 2)	100,0	22,6	62,6	0,6	1,7	11,0	1,6	..	..
1980 3)	100,0	23,7	55,6	2,8	5,2	11,0	1,7	..	..
1990	100,0	26,7	46,9	4,8	9,0	10,8	1,8	..	..
2000	100,0	31,1	36,7	7,3	11,4	11,4	2,1	..	..
2010	100,0	35,3	30,7	8,1	13,5	10,3	2,1	0,0	0,1
2011	100,0	35,5	30,3	8,1	13,7	10,2	2,1	0,1	0,1
2012	100,0	35,7	30,0	8,1	13,9	10,2	2,1	0,1	0,1
2013	100,0	35,8	29,5	8,2	14,2	10,1	2,1	0,1	0,1
2014	100,0	35,8	29,2	8,2	14,4	10,2	2,1	0,1	0,1
2015	100,0	35,8	28,8	8,3	14,6	10,2	2,1	0,1	0,1

1) Families of the type "registered couple with children" numbered 626 in 2015.
2) The breakdown of the census by type of family has been revised on the basis of interview surveys. (Aromaa, Cantell & Jaakkola: Avoliitto (Consensual Union), Research Institute of Legal Policy 49, Helsinki 1981).
3) The breakdown of the census by type of family has been revised on the basis of the 1981 register-based material on families and cohabiting couples.

1.1 Commonest family type for women aged 29 is married couple with children

Women's family types vary by age. The most typical family type for women aged under 29 with family is "cohabiting couple without children". Already for women aged 29, the commonest family type is “married couple with children”. This is natural as nowadays the first child is born at the average age of 28.8 and the first marriage is contracted at the average age of 31.2. “Married couple without children” only becomes the most typical family type for women once they have turned 53. The families of the oldest women (at least 91 years of age) tend to include a child rather than a husband. Just nine per cent of women of this age belong to the family population. In the light of family statistics, old age is different for men than for women. Thirty-seven per cent of the men aged at least 91 belong to families. Then the family is typically a married couple without any children living with them.

Figure 1A. Families by type and age of wife/mother in 2015 (families with father and children by age of father)

Figure 1B. Families by type and age of wife/mother in 2015 (families with father and children by age of father), relative breakdown

1.2 Number of registered partnerships rose by 170 from the year before

At the end of 2015, there were 1,020 male couples and 1,590 female couples in a registered partnership, which is a total of 170 couples more than in 2014. In most of the tables in this publication these families are included in married couples. In some of the tables on the whole country, these families form a group of their own. For reasons of privacy protection, this information can be given by municipality only if the number of couples is at least ten.

Figure 2 shows the age distribution of registered male and female couples according to the younger partner. In the other figures registered couples are included in married couples. There are still so few of registered couples that they would not be distinguishable as a separate group in figures concerning all families.

Figure 2. Registered partnerships by age of younger partner in 2015

1.3 Women aged under 40 without children are more often cohabiting than married

Up to the age of 39, women without children tend to prefer cohabitation to marriage. Where mothers are concerned, the only ones to favour cohabitation over marriage are in the small group of mothers aged under 25. The majority of mothers older than this living with their spouses are married. The older the woman, the more likely she is to be married to her spouse.

Married couples account for 65 per cent of all families and for 74 per cent of all married and cohabiting couples. Cohabiting couples make up 23 per cent of all families and 26 per cent of all married and cohabiting couples.

In 81 per cent of all married couples both spouses are married for the first time. In 67 per cent of the cohabiting couples neither spouse has been previously married. Hence, on average, there are clearly more couples where one of the spouses has been married before among cohabiting couples than among married couples. In 86 per cent of the registered male couples neither partner has been married before, the figure for female couples is 76 per cent.

1.4 Over one-half of fathers of one-parent families are divorced, 43 per cent of mothers

Seventy-four per cent of the women and 75 per cent of the men living with a cohabiting partner without children are unmarried, so there is hardly any difference between genders here. More cohabiting women than cohabiting men are widows. There is not much difference in the marital status of women and men living with children and cohabiting partners.

Table 3. Marital status of the man/woman/father/mother in a cohabiting partnership and in a one-parent family in 2015

Marital status	Type of family
	Cohabiting man no children	Cohabiting woman no children	Cohabiting man with children	Cohabiting woman with children	Father and children	Father and children aged 17 or under	Mother and children	Mother and children aged 17 or under
Unmarried	75,0	74,0	78,6	78,9	20,5	27,9	33,2	41,5
Married	0,7	0,6	0,4	0,5	13,1	15,1	10,4	12,5
Divorced	22,5	21,6	20,5	19,6	51,2	52,2	42,9	43,5
Widowed	1,8	3,8	0,5	1,0	15,2	4,7	13,5	2,5
Total	100,0	100,0	100,0	100,0	100,0	100,0	100,0	100,0
N	215 620	215 620	122 657	122 657	31 452	16 661	150 274	103 972

Mothers and fathers in one-parent families differ in their marital status. More than one-half of the fathers and 43 per cent of the mothers are divorced. Nearly one-third of the mothers are unmarried and around one-fifth of the fathers. However, it should be noted here that no limit is set on the age of a child, i.e. we are not referring to single supporters only. The child of a one-parent family can be of any age, meaning that families formed by old widowed mothers and their grown-up children, for example, are included.

Table 3 also contains columns for one-parent families, that is, fathers and mothers whose children are underage. Their marital status structure differs most clearly from the group of all one-parent families: there are fewer widows and more persons representing all other marital status groups. It is worth noting that relatively more fathers than mothers of one-parent families with children are widowed, although fewer fathers than mothers become widowed. In divorces, children usually stay with their mother, but there is no choice in the case of death. Of mothers of one-parent families with children, 41 per cent are unmarried, some from the start having become mothers without a spouse, but a large number as the result of dissolved cohabitation.

Source: Population and Justice Statistics, Statistics Finland

Inquiries: Eevi Lappalainen 029 551 3367, Timo Nikander 029 551 3250 , Marjut Pietiläinen 029 551 2798, info@stat.fi

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Updated 25.11.2016