US demographics by marital status and age group

These tables, compiled from information published by the US Census Bureau, show the proportion of American men and women by age group and marital status. "NM" means never married, "Single" includes never married, divorced, and widowed. Numbers given are in thousands. The difference between the numbers of men and women in each category is shaded in pink where there are more men (theoretically favoring women) and blue where there are more women (theoretically favoring men). Note that people in long-term relationships but are not married are still counted as single, so if we posit that the demographics of unmarried partners are comparable to those of married partners, it's fair to conclude that percent difference column would be larger (in both directions) if only single people  without long-term partners were counted.

In the first chart, note that single men outnumber single women in the younger age groups, by almost 4:3 in the late 20s. This can be attributed in part to birth rates that slightly favor boys, but more to the societal norm of the man being the older partner in the majority of relationships. The difference evens out and then reverses itself in middle age and beyond, with single women outnumbering single men by 2:1 and higher in the retirement years. The aforementioned societal norm plays a part here, along with the tendency for women to outlive men in old age.

The second chart shows the age differences between married partners. In most cases, the difference is not more than a few years. Where an age difference of at least two years exists, marriages where the man is older outnumber those where the woman is older by at least 3:1, and when the age difference approaches 20 years, that proportion is closer to 6:1.

Age group
Men
Women
%Dif
Single Men
Single Women
%Dif
NM Men
NM Women
%Dif
15-17
6566
6361
-3.12
6479 (98.6)
6261 (98.4)
-3.36
6458 (98.4)
6245 (98.2)
-3.30
18-24
14837
14476
-2.43
13589 (91.6)
12302 (85.0)
-9.47
13519 (91.1)
12115 (83.7)
-10.39
25-29
10928
10525
-3.69
7139 (65.3)
5516 (52.4)
-22.73
6800 (62.2)
5029 (47.8)
-26.04
30-34
9761
9871
+1.13
4184 (42.9)
3581 (36.3)
-14.41
3563 (36.5)
2683 (27.2)
-24.70
35-39
9902
9986
+0.86
3232 (32.7)
3059 (30.6)
-5.35
2324 (23.5)
1768 (17.7)
-23.92
40-44
10172
10387
+2.11
3253 (32.0)
3101 (29.9)
-4.67
2082 (20.5)
1430 (13.8)
-31.32
45-49
11092
11435
+3.09
3462 (31.2)
3578 (31.3)
+3.35
1830 (16.5)
1370 (12.0)
-25.14
50-54
10692
11169
+4.46
3137 (29.3)
3591 (32.2)
+14.47
1419 (13.3)
1113 (10.0)
-21.56
55-59
9318
9854
+5.75
2596 (27.9)
3091 (31.4)
+19.07
992 (10.7)
745 (7.6)
-24.90
60-64
7667
8556
+11.60
1840 (24.0)
3014 (35.2)
+63.80
553 (7.2)
573 (6.7)
+3.62
65-69
5672
6349
+11.94
1262 (22.3)
2553 (40.2)
+102.30
286 (5.0)
348 (5.5)
+21.68
70-74
4063
4873
+19.94
877 (21.6)
2395 (49.2)
+173.09
155 (3.8)
230 (4.8)
+48.39
75-79
3020
4161
+37.78
719 (23.8)
2403 (57.8)
+234.21
134 (4.4)
171 (4.1)
+27.61
80-84
2405
3375
+40.16
737 (30.6)
2263 (67.1)
+207.06
59 (2.5)
110 (3.3)
+86.44
85+
1631
3062
+87.74
680 (41.7)
2514 (82.1)
+269.71
52 (3.2)
140 (4.6)
+169.23
Total
117729
124440
+5.70
53186
59222
+11.35
40226
34070
-15.30

Age difference
Count
Percent
Cumu-M
Cumu-F
Eq. & Opp.
+20 or above
588
1.0
99.0

3.46:1
+15 to +19
890
1.5
97.5
1.0
5.78:1
+10 to +14
3105
5.1
92.4
2.5
4.77:1
+6 to +9
7103
11.8
80.6
7.6
4.46:1
+4 to +5
7674
12.7
67.9
19.4
3.92:1
+2 to +3
12953
21.5
46.4
32.1
3.26:1
-1 to +1
19574
32.4
14.0
53.6

-2 to -3
3972
6.6
7.4
86.0
1:3.26
-4 to -5
1957
3.2
4.2
92.6
1:3.92
-6 to -9
1593
2.6
1.6
95.8
1:4.46
-10 to -14
651
1.1
0.5
98.4
1:4.77
-15 to -19
154
0.2
0.3
99.5
1:5.78
-20 or below
170
0.3

99.7
1:3.46