| | Ledyard, CT | North Smithfield, RI | United States |
| Population | 15,313 | 12,537 | 329,725,481 |
| Female Population | 50.2% | 49.6% | 50.5% |
| Male Population | 49.8% | 50.4% | 49.5% |
| Median Age | 37.6 | 46.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 15,041 | 11,987 | 309,327,143 |
| Population - 2000 | 14,687 | 10,618 | 285,036,114 |
| Population - 1990 | 14,913 | 10,497 | 251,960,433 |
| Pop. 2000 to Now | -0.7% | 18.4% | 15.6% |
| Pop. 1990 to Now | -2.2% | 19.8% | 30.8% |
| space4 | | | |
| Population Density | 400.7 | 526.7 | 93.4 |
| Land Area | 38.2 | 23.8 | 3,531,905.4 |
| Water Area | 1.8 | 0.9 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Ledyard, CT | North Smithfield, RI | United States |
| Age 0 to 4 | 6.9% | 3.8% | 5.9% |
| Age 5 to 9 | 5.7% | 4.5% | 6.1% |
| Age 10 to 14 | 8.6% | 6.5% | 6.6% |
| Age 15 to 17 | 4.6% | 4.1% | 3.9% |
| Age 18 to 20 | 2.6% | 3.0% | 4.0% |
| Age 21 to 24 | 4.2% | 3.1% | 5.2% |
| Age 25 to 34 | 13.5% | 10.4% | 13.8% |
| Age 35 to 44 | 12.6% | 11.7% | 12.9% |
| Age 45 to 54 | 12.7% | 15.7% | 12.6% |
| Age 55 to 59 | 6.6% | 8.1% | 6.7% |
| Age 60 to 64 | 6.4% | 6.5% | 6.3% |
| Age 65 to 74 | 9.6% | 13.9% | 9.6% |
| Age 75 to 84 | 4.6% | 4.6% | 4.5% |
| Age 85 and over | 1.4% | 4.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Ledyard, CT | North Smithfield, RI | United States |
| White | 81.7% | 94.7% | 59.4% |
| Black | 1.1% | 0.6% | 12.2% |
| Asian | 4.2% | 0.9% | 5.6% |
| Native American | 1.8% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 5.3% | 1.2% | 3.2% |
| Hispanic | 5.8% | 2.6% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Ledyard, CT | North Smithfield, RI | United States |
| Married Population | 55.1% | 56.6% | 49.8% |
| Currently Married | 54.0% | 56.2% | 48.0% |
| Married but Separated | 1.1% | 0.4% | 1.8% |
| Single Population | 44.9% | 43.4% | 50.2% |
| Never Married | 26.8% | 25.1% | 33.8% |
| Divorced | 13.9% | 10.7% | 10.8% |
| Widowed | 4.2% | 7.6% | 5.6% |
| space5 | | | |
| Household Size | 2.68 | 2.42 | 2.60 |
| Households | 5,696 | 5,083 | 124,010,992 |
| Family Households | 3,934 | 3,300 | 80,755,759 |
| Married couple, w/children | 36.1% | 25.8% | 30.5% |
| Married couple, no children | 42.1% | 55.3% | 42.9% |
| Non Family Households | 1,762 | 1,783 | 43,255,233 |
| Single householder, w/children | 14.2% | 10.7% | 15.8% |
| Single householder, no children | 7.5% | 8.2% | 10.8% |