| | Lyndeborough, NH | Aurora, OH | United States |
| Population | 1,643 | 17,108 | 329,725,481 |
| Female Population | 44.4% | 51.9% | 50.5% |
| Male Population | 55.6% | 48.1% | 49.5% |
| Median Age | 49.3 | 46.1 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,683 | 15,540 | 309,327,143 |
| Population - 2000 | 1,585 | 13,556 | 285,036,114 |
| Population - 1990 | 1,294 | 9,192 | 251,960,433 |
| Pop. 2000 to Now | 9.2% | 21.5% | 15.6% |
| Pop. 1990 to Now | 33.7% | 79.2% | 30.8% |
| space4 | | | |
| Population Density | 54.0 | 746.7 | 93.4 |
| Land Area | 30.4 | 22.9 | 3,531,905.4 |
| Water Area | 0.1 | 1.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Lyndeborough, NH | Aurora, OH | United States |
| Age 0 to 4 | 5.4% | 5.5% | 5.9% |
| Age 5 to 9 | 3.4% | 4.6% | 6.1% |
| Age 10 to 14 | 4.9% | 7.0% | 6.6% |
| Age 15 to 17 | 1.8% | 5.8% | 3.9% |
| Age 18 to 20 | 5.1% | 3.9% | 4.0% |
| Age 21 to 24 | 3.1% | 2.7% | 5.2% |
| Age 25 to 34 | 9.1% | 7.3% | 13.8% |
| Age 35 to 44 | 10.0% | 12.6% | 12.9% |
| Age 45 to 54 | 17.3% | 14.0% | 12.6% |
| Age 55 to 59 | 13.1% | 6.5% | 6.7% |
| Age 60 to 64 | 10.3% | 8.1% | 6.3% |
| Age 65 to 74 | 11.0% | 12.4% | 9.6% |
| Age 75 to 84 | 5.1% | 6.6% | 4.5% |
| Age 85 and over | 0.5% | 3.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Lyndeborough, NH | Aurora, OH | United States |
| White | 89.0% | 88.2% | 59.4% |
| Black | 1.0% | 3.7% | 12.2% |
| Asian | 0.0% | 5.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 8.2% | 2.3% | 3.2% |
| Hispanic | 1.8% | 0.8% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Lyndeborough, NH | Aurora, OH | United States |
| Married Population | 65.3% | 58.4% | 49.8% |
| Currently Married | 63.6% | 58.0% | 48.0% |
| Married but Separated | 1.7% | 0.4% | 1.8% |
| Single Population | 34.7% | 41.6% | 50.2% |
| Never Married | 23.5% | 23.1% | 33.8% |
| Divorced | 9.0% | 10.3% | 10.8% |
| Widowed | 2.3% | 8.3% | 5.6% |
| space5 | | | |
| Household Size | 2.62 | 2.56 | 2.60 |
| Households | 627 | 6,561 | 124,010,992 |
| Family Households | 498 | 4,597 | 80,755,759 |
| Married couple, w/children | 24.5% | 42.2% | 30.5% |
| Married couple, no children | 63.5% | 44.2% | 42.9% |
| Non Family Households | 129 | 1,964 | 43,255,233 |
| Single householder, w/children | 7.2% | 7.4% | 15.8% |
| Single householder, no children | 4.8% | 6.2% | 10.8% |