| | Lamoni, IA | Americus, GA | United States |
| Population | 2,285 | 16,144 | 329,725,481 |
| Female Population | 47.6% | 55.1% | 50.5% |
| Male Population | 52.4% | 44.9% | 49.5% |
| Median Age | 27.7 | 30.6 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,327 | 17,014 | 309,327,143 |
| Population - 2000 | 2,444 | 17,013 | 285,036,114 |
| Population - 1990 | 2,319 | 16,512 | 251,960,433 |
| Pop. 2000 to Now | -10.2% | -11.9% | 15.6% |
| Pop. 1990 to Now | -5.3% | -9.2% | 30.8% |
| space4 | | | |
| Population Density | 577.3 | 1,428.6 | 93.4 |
| Land Area | 4.0 | 11.3 | 3,531,905.4 |
| Water Area | 0.1 | 0.2 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Lamoni, IA | Americus, GA | United States |
| Age 0 to 4 | 3.3% | 6.9% | 5.9% |
| Age 5 to 9 | 4.2% | 7.7% | 6.1% |
| Age 10 to 14 | 3.9% | 5.9% | 6.6% |
| Age 15 to 17 | 2.2% | 4.7% | 3.9% |
| Age 18 to 20 | 24.0% | 7.3% | 4.0% |
| Age 21 to 24 | 10.8% | 9.2% | 5.2% |
| Age 25 to 34 | 9.5% | 12.9% | 13.8% |
| Age 35 to 44 | 6.5% | 10.6% | 12.9% |
| Age 45 to 54 | 6.6% | 11.1% | 12.6% |
| Age 55 to 59 | 5.6% | 4.0% | 6.7% |
| Age 60 to 64 | 6.0% | 4.7% | 6.3% |
| Age 65 to 74 | 8.3% | 8.8% | 9.6% |
| Age 75 to 84 | 6.7% | 3.8% | 4.5% |
| Age 85 and over | 2.5% | 2.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | Lamoni, IA | Americus, GA | United States |
| White | 80.4% | 32.7% | 59.4% |
| Black | 5.2% | 62.0% | 12.2% |
| Asian | 1.7% | 1.4% | 5.6% |
| Native American | 0.2% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.2% | 0.4% |
| Two or More Races | 6.7% | 2.0% | 3.2% |
| Hispanic | 5.8% | 1.7% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Lamoni, IA | Americus, GA | United States |
| Married Population | 41.5% | 28.6% | 49.8% |
| Currently Married | 40.9% | 27.3% | 48.0% |
| Married but Separated | 0.6% | 1.3% | 1.8% |
| Single Population | 58.5% | 71.4% | 50.2% |
| Never Married | 46.8% | 51.0% | 33.8% |
| Divorced | 6.2% | 12.7% | 10.8% |
| Widowed | 5.6% | 7.7% | 5.6% |
| space5 | | | |
| Household Size | 2.02 | 2.43 | 2.60 |
| Households | 849 | 6,146 | 124,010,992 |
| Family Households | 483 | 3,188 | 80,755,759 |
| Married couple, w/children | 26.5% | 15.4% | 30.5% |
| Married couple, no children | 52.8% | 32.4% | 42.9% |
| Non Family Households | 366 | 2,958 | 43,255,233 |
| Single householder, w/children | 10.8% | 36.4% | 15.8% |
| Single householder, no children | 9.9% | 15.7% | 10.8% |