Population Demographics for Greenwich, Connecticut in 2020, 2019 
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  |  Total population in Greenwich |   |  | Total Population: | 12,942 |  | Male Population: | 5,949 |  | Female Population: | 6,993 |  
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  |  Median age in Greenwich |   |  | Both sexes | 42 |  | Male | 40 |  | Female | 45 |  
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  |  Population in households in Greenwich |   |  | Total Population: | 12,827 |  | Male Population: | 5,882 |  | Under 5 years: | 349 |  | 5 to 9 years: | 369 |  | 10 to 14 years: | 417 |  | 15 to 17 years: | 267 |  | 18 and 19 years: | 121 |  | 20 years: | 45 |  | 21 years: | 48 |  | 22 to 24 years: | 143 |  | 25 to 29 years: | 364 |  | 30 to 34 years: | 397 |  | 35 to 39 years: | 396 |  | 40 to 44 years: | 417 |  | 45 to 49 years: | 454 |  | 50 to 54 years: | 467 |  | 55 to 59 years: | 419 |  | 60 and 61 years: | 139 |  | 62 to 64 years: | 178 |  | 65 and 66 years: | 118 |  | 67 to 69 years: | 167 |  | 70 to 74 years: | 192 |  | 75 to 79 years: | 159 |  | 80 to 84 years: | 143 |  | 85 years and over: | 113 |  | Female Population: | 6,945 |  | Under 5 years: | 361 |  | 5 to 9 years: | 360 |  | 10 to 14 years: | 403 |  | 15 to 17 years: | 236 |  | 18 and 19 years: | 84 |  | 20 years: | 42 |  | 21 years: | 42 |  | 22 to 24 years: | 145 |  | 25 to 29 years: | 402 |  | 30 to 34 years: | 427 |  | 35 to 39 years: | 436 |  | 40 to 44 years: | 524 |  | 45 to 49 years: | 621 |  | 50 to 54 years: | 595 |  | 55 to 59 years: | 451 |  | 60 and 61 years: | 164 |  | 62 to 64 years: | 243 |  | 65 and 66 years: | 144 |  | 67 to 69 years: | 219 |  | 70 to 74 years: | 273 |  | 75 to 79 years: | 245 |  | 80 to 84 years: | 262 |  | 85 years and over: | 266 |  
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  |  Average household size in Greenwich |   |  | Total: | 2 |  | Under 18 years: | 0 |  | 18 years and over: | 1 |  
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  |  Number of occupied homes in Greenwich |   |  | Total: | 5,779 |  | Family led homes: | 3,247 |  | Husband-wife family: | 2,419 |  | Other family: | 828 |  | Population of male led with no wife present: | 160 |  | Population female led with no husband present: | 668 |  | Population of Nonfamily homes: | 2,532 |  | Population living alone: | 2,195 |  | Population not living alone: | 337 |  
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  |  Total occupied homes in Greenwich with people under 18 years old: |   |  | Total: | 5,779 |  | Population of homes with one or more people under 18 years: | 1,554 |  | Population of family homes: | 1,546 |  | Husband-wife family: | 1,097 |  | Under 6 years only: | 292 |  | Under 6 years and 6 to 17 years: | 193 |  | 6 to 17 years only: | 612 |  | Other family: | 449 |  | Male householder, no wife present: | 64 |  | Under 6 years only: | 23 |  | Under 6 years and 6 to 17 years: | 3 |  | 6 to 17 years only: | 38 |  | Female led with no husband present: | 385 |  | Under 6 years only: | 76 |  | Under 6 years and 6 to 17 years: | 49 |  | 6 to 17 years only: | 260 |  | Nonfamily households: | 8 |  | Male led households: | 4 |  | Under 6 years only: | 2 |  | Under 6 years and 6 to 17 years: | 1 |  | 6 to 17 years only: | 1 |  | Female led householder: | 4 |  | Under 6 years only: | 0 |  | Under 6 years and 6 to 17 years: | 0 |  | 6 to 17 years only: | 4 |  | Households with no people under 18 years: | 4,225 |  | Family households: | 1,701 |  | Husband-wife family: | 1,322 |  | Other family: | 379 |  | Male led with no wife present: | 96 |  | Female led with no husband present: | 283 |  | Nonfamily households: | 2,524 |  | Male led householder: | 957 |  | Female led householder: | 1,567 |  
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  |  Total number led homes in Greenwich, by type |   |  | Total Home Population: | 5,779 |  | Population of Family homes: | 3,247 |  | Population of 15 to 24 year olds: | 31 |  | Population of 25 to 34 year olds: | 400 |  | Population of 35 to 44 year olds: | 674 |  | Population of 45 to 54 year olds: | 827 |  | Population of 55 to 59 year olds: | 352 |  | Population of 60 to 64 year olds: | 258 |  | Population of 65 to 74 year olds: | 380 |  | Population of 75 to 84 year olds: | 240 |  | Population of 85 year olds and over: | 85 |  | Population of Nonfamily Homes: | 2,532 |  | Population of 15 to 24 year olds: | 53 |  | Population of 25 to 34 year olds: | 367 |  | Population of 35 to 44 year olds: | 339 |  | Population of 45 to 54 year olds: | 450 |  | Population of 55 to 59 year olds: | 176 |  | Population of 60 to 64 year olds: | 200 |  | Population of 65 to 74 year olds: | 364 |  | Population of 75 to 84 year olds: | 359 |  | Population of 85 year olds and over: | 224 |  
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  |  households in Greenwich containing people over 60 |   |  | Total Population: | 5,779 |  | Population of homes with one or more people 60 years and over: | 2,283 |  | 1-person household: | 1,077 |  | 2-or-more-person household: | 1,206 |  | Family households: | 1,122 |  | Nonfamily households: | 84 |  | Population of homes with no people 60 years and over: | 3,496 |  | 1-person household: | 1,118 |  | 2-or-more-person household: | 2,378 |  | Family homes: | 2,125 |  | Nonfamily homes: | 253 |  
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  |  homes in Greenwich with multiple generations. |   |  | Total Population: | 5,779 |  | Home has three or more generations: | 114 |  | Home does not have three or more generations: | 5,665 |  
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  |  Unmarried population in Greenwich under 18 years old in homes |   |  | Total Population: | 2,761 |  | Unmarried partner of home lead present: | 84 |  | In family homes: | 84 |  | Population of male led and male partner homes: | 13 |  | Population of male led and female partner households: | 24 |  | Population of female led and female partner households: | 7 |  | Population of female led and male partner households: | 40 |  | In nonfamily homes: | 0 |  | Population of male led and male partner homes: | 0 |  | Population of male led and female partner homes: | 0 |  | Population of female led and female partner homes: | 0 |  | Population of female led and male partner homes: | 0 |  | No unmarried partner of home lead present: | 2,677 |  | In family homes: | 2,669 |  | Population of husband-wife family homes: | 2,072 |  | Population of male lead with no wife present, family homes: | 47 |  | Population of female lead with no husband present, family homes: | 550 |  | In nonfamily homes: | 8 |  
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  |  Population in families living in Greenwich |   |  | Total Population: | 9,678 |  | Population Under 18 years: | 2,744 |  | Population 18 years and over: | 6,934 |  
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  |  How long in Greenwich have lived in one place. |   |  | Total: | 5,779 |  | Population of Owner occupied homes: | 2,660 |  | Family home: | 1,685 |  | Nonfamily homess: | 975 |  | Male led home: | 266 |  | Living alone: | 236 |  | Not living alone: | 30 |  | Female led home: | 709 |  | Living alone: | 657 |  | Not living alone: | 52 |  | Population of Renter occupied homes: | 3,119 |  | Family run homes: | 1,562 |  | Husband-wife family: | 970 |  | Other family: | 592 |  | Male led with no wife present: | 104 |  | Female led with no husband present: | 488 |  | Nonfamily Homes: | 1,557 |  | Male led homes: | 695 |  | Male living alone: | 558 |  | Male not living alone: | 137 |  | Female led homes: | 862 |  | Females living alone: | 744 |  | Females not living alone: | 118 |  
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