Population Demographics for Belmont, Massachusetts in 2020, 2019 
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  |  Total population in Belmont |   |  | Total Population: | 24,729 |  | Male Population: | 11,620 |  | Female Population: | 13,109 |  
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  |  Median age in Belmont |   |  | Both sexes | 42 |  | Male | 40 |  | Female | 42 |  
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  |  Population in households in Belmont |   |  | Total Population: | 24,534 |  | Male Population: | 11,560 |  | Under 5 years: | 829 |  | 5 to 9 years: | 833 |  | 10 to 14 years: | 840 |  | 15 to 17 years: | 558 |  | 18 and 19 years: | 212 |  | 20 years: | 48 |  | 21 years: | 70 |  | 22 to 24 years: | 309 |  | 25 to 29 years: | 583 |  | 30 to 34 years: | 630 |  | 35 to 39 years: | 792 |  | 40 to 44 years: | 954 |  | 45 to 49 years: | 953 |  | 50 to 54 years: | 917 |  | 55 to 59 years: | 745 |  | 60 and 61 years: | 284 |  | 62 to 64 years: | 354 |  | 65 and 66 years: | 210 |  | 67 to 69 years: | 306 |  | 70 to 74 years: | 379 |  | 75 to 79 years: | 325 |  | 80 to 84 years: | 221 |  | 85 years and over: | 208 |  | Female Population: | 12,974 |  | Under 5 years: | 725 |  | 5 to 9 years: | 887 |  | 10 to 14 years: | 896 |  | 15 to 17 years: | 516 |  | 18 and 19 years: | 173 |  | 20 years: | 64 |  | 21 years: | 54 |  | 22 to 24 years: | 340 |  | 25 to 29 years: | 689 |  | 30 to 34 years: | 770 |  | 35 to 39 years: | 906 |  | 40 to 44 years: | 1,047 |  | 45 to 49 years: | 1,064 |  | 50 to 54 years: | 1,057 |  | 55 to 59 years: | 904 |  | 60 and 61 years: | 319 |  | 62 to 64 years: | 445 |  | 65 and 66 years: | 265 |  | 67 to 69 years: | 350 |  | 70 to 74 years: | 427 |  | 75 to 79 years: | 370 |  | 80 to 84 years: | 345 |  | 85 years and over: | 361 |  
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  |  Average household size in Belmont |   |  | Total: | 3 |  | Under 18 years: | 1 |  | 18 years and over: | 2 |  
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  |  Number of occupied homes in Belmont |   |  | Total: | 9,651 |  | Family led homes: | 6,620 |  | Husband-wife family: | 5,486 |  | Other family: | 1,134 |  | Population of male led with no wife present: | 275 |  | Population female led with no husband present: | 859 |  | Population of Nonfamily homes: | 3,031 |  | Population living alone: | 2,333 |  | Population not living alone: | 698 |  
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  |  Total occupied homes in Belmont with people under 18 years old: |   |  | Total: | 9,651 |  | Population of homes with one or more people under 18 years: | 3,436 |  | Population of family homes: | 3,427 |  | Husband-wife family: | 2,804 |  | Under 6 years only: | 757 |  | Under 6 years and 6 to 17 years: | 468 |  | 6 to 17 years only: | 1,579 |  | Other family: | 623 |  | Male householder, no wife present: | 123 |  | Under 6 years only: | 20 |  | Under 6 years and 6 to 17 years: | 10 |  | 6 to 17 years only: | 93 |  | Female led with no husband present: | 500 |  | Under 6 years only: | 63 |  | Under 6 years and 6 to 17 years: | 43 |  | 6 to 17 years only: | 394 |  | Nonfamily households: | 9 |  | Male led households: | 5 |  | Under 6 years only: | 0 |  | Under 6 years and 6 to 17 years: | 2 |  | 6 to 17 years only: | 3 |  | Female led householder: | 4 |  | Under 6 years only: | 1 |  | Under 6 years and 6 to 17 years: | 0 |  | 6 to 17 years only: | 3 |  | Households with no people under 18 years: | 6,215 |  | Family households: | 3,193 |  | Husband-wife family: | 2,682 |  | Other family: | 511 |  | Male led with no wife present: | 152 |  | Female led with no husband present: | 359 |  | Nonfamily households: | 3,022 |  | Male led householder: | 1,113 |  | Female led householder: | 1,909 |  
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  |  Total number led homes in Belmont, by type |   |  | Total Home Population: | 9,651 |  | Population of Family homes: | 6,620 |  | Population of 15 to 24 year olds: | 34 |  | Population of 25 to 34 year olds: | 661 |  | Population of 35 to 44 year olds: | 1,526 |  | Population of 45 to 54 year olds: | 1,786 |  | Population of 55 to 59 year olds: | 686 |  | Population of 60 to 64 year olds: | 567 |  | Population of 65 to 74 year olds: | 754 |  | Population of 75 to 84 year olds: | 441 |  | Population of 85 year olds and over: | 165 |  | Population of Nonfamily Homes: | 3,031 |  | Population of 15 to 24 year olds: | 90 |  | Population of 25 to 34 year olds: | 465 |  | Population of 35 to 44 year olds: | 359 |  | Population of 45 to 54 year olds: | 481 |  | Population of 55 to 59 year olds: | 265 |  | Population of 60 to 64 year olds: | 241 |  | Population of 65 to 74 year olds: | 410 |  | Population of 75 to 84 year olds: | 442 |  | Population of 85 year olds and over: | 278 |  
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  |  households in Belmont containing people over 60 |   |  | Total Population: | 9,651 |  | Population of homes with one or more people 60 years and over: | 3,622 |  | 1-person household: | 1,270 |  | 2-or-more-person household: | 2,352 |  | Family households: | 2,236 |  | Nonfamily households: | 116 |  | Population of homes with no people 60 years and over: | 6,029 |  | 1-person household: | 1,063 |  | 2-or-more-person household: | 4,966 |  | Family homes: | 4,384 |  | Nonfamily homes: | 582 |  
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  |  homes in Belmont with multiple generations. |   |  | Total Population: | 9,651 |  | Home has three or more generations: | 191 |  | Home does not have three or more generations: | 9,460 |  
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  |  Unmarried population in Belmont under 18 years old in homes |   |  | Total Population: | 6,082 |  | Unmarried partner of home lead present: | 156 |  | In family homes: | 143 |  | Population of male led and male partner homes: | 10 |  | Population of male led and female partner households: | 44 |  | Population of female led and female partner households: | 22 |  | Population of female led and male partner households: | 67 |  | In nonfamily homes: | 13 |  | Population of male led and male partner homes: | 0 |  | Population of male led and female partner homes: | 10 |  | Population of female led and female partner homes: | 0 |  | Population of female led and male partner homes: | 3 |  | No unmarried partner of home lead present: | 5,926 |  | In family homes: | 5,922 |  | Population of husband-wife family homes: | 5,141 |  | Population of male lead with no wife present, family homes: | 122 |  | Population of female lead with no husband present, family homes: | 659 |  | In nonfamily homes: | 4 |  
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  |  Population in families living in Belmont |   |  | Total Population: | 20,323 |  | Population Under 18 years: | 6,044 |  | Population 18 years and over: | 14,279 |  
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  |  How long in Belmont have lived in one place. |   |  | Total: | 9,651 |  | Population of Owner occupied homes: | 6,107 |  | Family home: | 4,782 |  | Nonfamily homess: | 1,325 |  | Male led home: | 410 |  | Living alone: | 328 |  | Not living alone: | 82 |  | Female led home: | 915 |  | Living alone: | 811 |  | Not living alone: | 104 |  | Population of Renter occupied homes: | 3,544 |  | Family run homes: | 1,838 |  | Husband-wife family: | 1,331 |  | Other family: | 507 |  | Male led with no wife present: | 113 |  | Female led with no husband present: | 394 |  | Nonfamily Homes: | 1,706 |  | Male led homes: | 708 |  | Male living alone: | 456 |  | Male not living alone: | 252 |  | Female led homes: | 998 |  | Females living alone: | 738 |  | Females not living alone: | 260 |  
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