Population Demographics for Groton, Connecticut in 2020, 2019 
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  |  Total population in Groton |   |  | Total Population: | 10,389 |  | Male Population: | 5,543 |  | Female Population: | 4,846 |  
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  |  Median age in Groton |   |  | Both sexes | 30 |  | Male | 28 |  | Female | 34 |  
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  |  Population in households in Groton |   |  | Total Population: | 9,385 |  | Male Population: | 4,559 |  | Under 5 years: | 404 |  | 5 to 9 years: | 326 |  | 10 to 14 years: | 256 |  | 15 to 17 years: | 166 |  | 18 and 19 years: | 103 |  | 20 years: | 46 |  | 21 years: | 55 |  | 22 to 24 years: | 253 |  | 25 to 29 years: | 469 |  | 30 to 34 years: | 334 |  | 35 to 39 years: | 289 |  | 40 to 44 years: | 297 |  | 45 to 49 years: | 294 |  | 50 to 54 years: | 326 |  | 55 to 59 years: | 287 |  | 60 and 61 years: | 100 |  | 62 to 64 years: | 121 |  | 65 and 66 years: | 63 |  | 67 to 69 years: | 88 |  | 70 to 74 years: | 90 |  | 75 to 79 years: | 64 |  | 80 to 84 years: | 72 |  | 85 years and over: | 56 |  | Female Population: | 4,826 |  | Under 5 years: | 364 |  | 5 to 9 years: | 303 |  | 10 to 14 years: | 246 |  | 15 to 17 years: | 170 |  | 18 and 19 years: | 105 |  | 20 years: | 66 |  | 21 years: | 66 |  | 22 to 24 years: | 291 |  | 25 to 29 years: | 498 |  | 30 to 34 years: | 351 |  | 35 to 39 years: | 294 |  | 40 to 44 years: | 292 |  | 45 to 49 years: | 353 |  | 50 to 54 years: | 346 |  | 55 to 59 years: | 276 |  | 60 and 61 years: | 98 |  | 62 to 64 years: | 127 |  | 65 and 66 years: | 69 |  | 67 to 69 years: | 78 |  | 70 to 74 years: | 118 |  | 75 to 79 years: | 107 |  | 80 to 84 years: | 103 |  | 85 years and over: | 105 |  
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  |  Average household size in Groton |   |  | Total: | 2 |  | Under 18 years: | 0 |  | 18 years and over: | 1 |  
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  |  Number of occupied homes in Groton |   |  | Total: | 4,182 |  | Family led homes: | 2,394 |  | Husband-wife family: | 1,421 |  | Other family: | 973 |  | Population of male led with no wife present: | 206 |  | Population female led with no husband present: | 767 |  | Population of Nonfamily homes: | 1,788 |  | Population living alone: | 1,402 |  | Population not living alone: | 386 |  
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  |  Total occupied homes in Groton with people under 18 years old: |   |  | Total: | 4,182 |  | Population of homes with one or more people under 18 years: | 1,340 |  | Population of family homes: | 1,325 |  | Husband-wife family: | 612 |  | Under 6 years only: | 200 |  | Under 6 years and 6 to 17 years: | 109 |  | 6 to 17 years only: | 303 |  | Other family: | 713 |  | Male householder, no wife present: | 118 |  | Under 6 years only: | 39 |  | Under 6 years and 6 to 17 years: | 13 |  | 6 to 17 years only: | 66 |  | Female led with no husband present: | 595 |  | Under 6 years only: | 225 |  | Under 6 years and 6 to 17 years: | 105 |  | 6 to 17 years only: | 265 |  | Nonfamily households: | 15 |  | Male led households: | 12 |  | Under 6 years only: | 7 |  | Under 6 years and 6 to 17 years: | 1 |  | 6 to 17 years only: | 4 |  | Female led householder: | 3 |  | Under 6 years only: | 1 |  | Under 6 years and 6 to 17 years: | 0 |  | 6 to 17 years only: | 2 |  | Households with no people under 18 years: | 2,842 |  | Family households: | 1,069 |  | Husband-wife family: | 809 |  | Other family: | 260 |  | Male led with no wife present: | 88 |  | Female led with no husband present: | 172 |  | Nonfamily households: | 1,773 |  | Male led householder: | 923 |  | Female led householder: | 850 |  
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  |  Total number led homes in Groton, by type |   |  | Total Home Population: | 4,182 |  | Population of Family homes: | 2,394 |  | Population of 15 to 24 year olds: | 195 |  | Population of 25 to 34 year olds: | 555 |  | Population of 35 to 44 year olds: | 487 |  | Population of 45 to 54 year olds: | 478 |  | Population of 55 to 59 year olds: | 183 |  | Population of 60 to 64 year olds: | 165 |  | Population of 65 to 74 year olds: | 181 |  | Population of 75 to 84 year olds: | 110 |  | Population of 85 year olds and over: | 40 |  | Population of Nonfamily Homes: | 1,788 |  | Population of 15 to 24 year olds: | 179 |  | Population of 25 to 34 year olds: | 366 |  | Population of 35 to 44 year olds: | 205 |  | Population of 45 to 54 year olds: | 344 |  | Population of 55 to 59 year olds: | 174 |  | Population of 60 to 64 year olds: | 131 |  | Population of 65 to 74 year olds: | 166 |  | Population of 75 to 84 year olds: | 143 |  | Population of 85 year olds and over: | 80 |  
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  |  households in Groton containing people over 60 |   |  | Total Population: | 4,182 |  | Population of homes with one or more people 60 years and over: | 1,108 |  | 1-person household: | 484 |  | 2-or-more-person household: | 624 |  | Family households: | 579 |  | Nonfamily households: | 45 |  | Population of homes with no people 60 years and over: | 3,074 |  | 1-person household: | 918 |  | 2-or-more-person household: | 2,156 |  | Family homes: | 1,815 |  | Nonfamily homes: | 341 |  
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  |  homes in Groton with multiple generations. |   |  | Total Population: | 4,182 |  | Home has three or more generations: | 111 |  | Home does not have three or more generations: | 4,071 |  
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  |  Unmarried population in Groton under 18 years old in homes |   |  | Total Population: | 2,232 |  | Unmarried partner of home lead present: | 254 |  | In family homes: | 242 |  | Population of male led and male partner homes: | 9 |  | Population of male led and female partner households: | 83 |  | Population of female led and female partner households: | 3 |  | Population of female led and male partner households: | 147 |  | In nonfamily homes: | 12 |  | 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: | 2 |  | Population of female led and male partner homes: | 0 |  | No unmarried partner of home lead present: | 1,978 |  | In family homes: | 1,967 |  | Population of husband-wife family homes: | 1,035 |  | Population of male lead with no wife present, family homes: | 102 |  | Population of female lead with no husband present, family homes: | 830 |  | In nonfamily homes: | 11 |  
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  |  Population in families living in Groton |   |  | Total Population: | 6,880 |  | Population Under 18 years: | 2,191 |  | Population 18 years and over: | 4,689 |  
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  |  How long in Groton have lived in one place. |   |  | Total: | 4,182 |  | Population of Owner occupied homes: | 1,771 |  | Family home: | 1,154 |  | Nonfamily homess: | 617 |  | Male led home: | 265 |  | Living alone: | 208 |  | Not living alone: | 57 |  | Female led home: | 352 |  | Living alone: | 300 |  | Not living alone: | 52 |  | Population of Renter occupied homes: | 2,411 |  | Family run homes: | 1,240 |  | Husband-wife family: | 529 |  | Other family: | 711 |  | Male led with no wife present: | 121 |  | Female led with no husband present: | 590 |  | Nonfamily Homes: | 1,171 |  | Male led homes: | 670 |  | Male living alone: | 502 |  | Male not living alone: | 168 |  | Female led homes: | 501 |  | Females living alone: | 392 |  | Females not living alone: | 109 |  
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