Last official estimated population of New London County was 274,102 (year 2014)[1]. This was 0.086% of total US population and 7.6% of total Connecticut state population. Area of New London County is 771.9 mi² (=1999.3 km²), in this year population density was 355.09 p/mi². If population growth rate would be same as in period 2010-2014 (+0%/yr), New London County population in 2024 would be 274,220 [0].
Historical population of New London County for period 1790-2014 [1] , [2] , [3]:
Estimated population for 2014[1]. Population density is in p./sq.mi [4]. Changes are for period 2010-2015. Value is %/year. Boundary lines are approx. 2012 [5]. Click on flag to hide it.
Population • Density • Changes • Legends • Position
[1790-1800] +0.5 %/yr
[1800-1810] -0.05 %/yr
[1810-1820] +0.35 %/yr
[1820-1830] +1.62 %/yr
[1830-1840] +0.52 %/yr
[1840-1850] +1.54 %/yr
[1850-1860] +1.77 %/yr
[1860-1870] +0.76 %/yr
[1870-1880] +0.95 %/yr
[1880-1890] +0.47 %/yr
[1890-1900] +0.77 %/yr
[1900-1910] +0.98 %/yr
[1910-1920] +1.38 %/yr
[1920-1930] +1.29 %/yr
[1930-1940] +0.51 %/yr
[1940-1950] +1.46 %/yr
[1950-1960] +2.52 %/yr
[1960-1970] +2.18 %/yr
[1970-1980] +0.34 %/yr
[1980-1990] +0.67 %/yr
[1990-2000] +0.16 %/yr
[2000-2005] +0.8 %/yr
[2005-2010] +0.32 %/yr
[2010-2014] +0 %/yr
Looking for settlements in New London County? Visit this page: Settlements in New London County, CT
Population of New London County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 7032 | 6920 | 13,952 |
| 5 to 9 | 7545 | 7400 | 14,945 |
| 10 to 14 | 8313 | 8016 | 16,329 |
| 15 to 19 | 9432 | 8573 | 18,005 |
| 20 to 24 | 12271 | 8762 | 21,033 |
| 25 to 29 | 10005 | 8337 | 18,342 |
| 30 to 34 | 8395 | 8099 | 16,494 |
| 35 to 39 | 7568 | 7568 | 15,136 |
| 40 to 44 | 8177 | 8385 | 16,562 |
| 45 to 49 | 9259 | 9931 | 19,190 |
| 50 to 54 | 10646 | 10942 | 21,588 |
| 55 to 59 | 10264 | 10483 | 20,747 |
| 60 to 64 | 8483 | 8947 | 17,430 |
| 65 to 69 | 6940 | 7345 | 14,285 |
| 70 to 74 | 5137 | 5502 | 10,639 |
| 75 to 79 | 3143 | 3975 | 7,118 |
| 80 to 84 | 2263 | 3192 | 5,455 |
| 85+ | 2208 | 4218 | 6,426 |
New London County resident population estimates by Sex, Race, and Hispanic Origin[1b]. For full list of abbrevations see: population.us/about page.
| Race | Male | Female | Total |
| NH | 123185 | 123311 | 246,496 |
| WAC | 118574 | 119192 | 237,766 |
| WA | 114467 | 115098 | 229,565 |
| NHWAC | 107137 | 108406 | 215,543 |
| NHWA | 103822 | 105084 | 208,906 |
| H | 13896 | 13284 | 27,180 |
| BAC | 12630 | 11525 | 24,155 |
| HWAC | 11437 | 10786 | 22,223 |
| HWA | 10645 | 10014 | 20,659 |
| NHBAC | 10607 | 9228 | 19,835 |
| BA | 10024 | 8763 | 18,787 |
| NHBA | 8581 | 7079 | 15,660 |
| AAC | 7372 | 7636 | 15,008 |
| NHAAC | 6964 | 7321 | 14,285 |
| AA | 5986 | 6342 | 12,328 |
| NHAA | 5773 | 6166 | 11,939 |
| TOM | 4734 | 4744 | 9,478 |
| NHTOM | 3810 | 3839 | 7,649 |
| IAC | 3270 | 3182 | 6,452 |
| NHIAC | 2408 | 2373 | 4,781 |
| HBAC | 2023 | 2297 | 4,320 |
| HBA | 1443 | 1684 | 3,127 |
| IA | 1606 | 1468 | 3,074 |
| NHIA | 1089 | 1025 | 2,114 |
| HTOM | 924 | 905 | 1,829 |
| HIAC | 862 | 809 | 1,671 |
| HIA | 517 | 443 | 960 |
| NAC | 527 | 377 | 904 |
| HAAC | 408 | 315 | 723 |
| NHNAC | 294 | 263 | 557 |
| NA | 264 | 180 | 444 |
| HAA | 213 | 176 | 389 |
| HNAC | 233 | 114 | 347 |
| NHNA | 110 | 118 | 228 |
| HNA | 154 | 62 | 216 |
• Hartford County population
39.6 mi, 
305°
• New Haven County
41.9 mi, 
258°
• Providence County
38.7 mi, 
44°
• Kent County
30.6 mi, 
63°
• Middlesex County
21.6 mi, 262°
• Tolland County
29.2 mi, 
335°
• Washington County
25.9 mi, 
101°
• Windham County
25.1 mi, 
14°
• Newport County
42.7 mi, 
87°
• Bristol County
45.2 mi, 
69°
[0] Calculated by population.us from last known population growth rate, not official data.
[1] County population - 2014, archived from the original, retrieved 02/23/2016
[1b] Annual County Resident Population Estimates by Age, Sex, Race, and Hispanic Origin, (used only data for 2014) archived from the original, retrieved 02/23/2016
[2] County population - 2000-2010, archived from the original, retrieved 02/23/2016
[3] Population of States and Counties of the United States: 1790 to 1992, PDF, 15 Mb, census.gov, retrieved 02/23/2016
[4] County area, latitude longitude data, retrieved 02/23/2016
[5] County boundaries, CSV files on boundaries.us, retrived 03/18/2016
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