| | Manning, IA | Emerson, IA | United States |
| Population | 1,510 | 483 | 329,725,481 |
| Female Population | 48.5% | 50.1% | 50.5% |
| Male Population | 51.5% | 49.9% | 49.5% |
| Median Age | 38.1 | 47.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,516 | 437 | 309,327,143 |
| Population - 2000 | 1,490 | 480 | 285,036,114 |
| Population - 1990 | 1,484 | 476 | 251,960,433 |
| Pop. 2000 to Now | -5.8% | -9.4% | 15.6% |
| Pop. 1990 to Now | -5.5% | -8.6% | 30.8% |
| space4 | | | |
| Population Density | 607.4 | 1,886.7 | 93.4 |
| Land Area | 2.5 | 0.3 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Manning, IA | Emerson, IA | United States |
| Age 0 to 4 | 5.8% | 2.1% | 5.9% |
| Age 5 to 9 | 9.1% | 8.5% | 6.1% |
| Age 10 to 14 | 3.4% | 6.8% | 6.6% |
| Age 15 to 17 | 2.0% | 5.6% | 3.9% |
| Age 18 to 20 | 2.9% | 2.7% | 4.0% |
| Age 21 to 24 | 3.2% | 2.5% | 5.2% |
| Age 25 to 34 | 17.5% | 9.7% | 13.8% |
| Age 35 to 44 | 11.3% | 8.1% | 12.9% |
| Age 45 to 54 | 12.6% | 18.4% | 12.6% |
| Age 55 to 59 | 5.8% | 4.1% | 6.7% |
| Age 60 to 64 | 5.0% | 7.7% | 6.3% |
| Age 65 to 74 | 8.6% | 14.5% | 9.6% |
| Age 75 to 84 | 8.9% | 4.3% | 4.5% |
| Age 85 and over | 3.8% | 5.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Manning, IA | Emerson, IA | United States |
| White | 87.9% | 97.5% | 59.4% |
| Black | 0.1% | 0.0% | 12.2% |
| Asian | 3.1% | 0.6% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 3.7% | 0.0% | 0.4% |
| Two or More Races | 4.2% | 0.4% | 3.2% |
| Hispanic | 1.0% | 1.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Manning, IA | Emerson, IA | United States |
| Married Population | 52.5% | 60.2% | 49.8% |
| Currently Married | 51.7% | 60.2% | 48.0% |
| Married but Separated | 0.7% | 0.0% | 1.8% |
| Single Population | 47.5% | 39.9% | 50.2% |
| Never Married | 25.7% | 19.8% | 33.8% |
| Divorced | 13.5% | 11.8% | 10.8% |
| Widowed | 8.3% | 8.3% | 5.6% |
| space5 | | | |
| Household Size | 2.03 | 2.28 | 2.60 |
| Households | 716 | 212 | 124,010,992 |
| Family Households | 362 | 136 | 80,755,759 |
| Married couple, w/children | 27.6% | 24.3% | 30.5% |
| Married couple, no children | 58.3% | 61.8% | 42.9% |
| Non Family Households | 354 | 76 | 43,255,233 |
| Single householder, w/children | 8.8% | 11.0% | 15.8% |
| Single householder, no children | 5.2% | 2.9% | 10.8% |