| | Piedmont, CA | Burlingame, CA | United States |
| Population | 11,368 | 31,142 | 329,725,481 |
| Female Population | 49.5% | 48.0% | 50.5% |
| Male Population | 50.5% | 52.0% | 49.5% |
| Median Age | 45.4 | 40.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 10,709 | 28,847 | 309,327,143 |
| Population - 2000 | 10,952 | 28,158 | 285,036,114 |
| Population - 1990 | 10,602 | 26,801 | 251,960,433 |
| Pop. 2000 to Now | 3.5% | 5.0% | 15.6% |
| Pop. 1990 to Now | 6.9% | 10.3% | 30.8% |
| space4 | | | |
| Population Density | 6,687.1 | 7,069.7 | 93.4 |
| Land Area | 1.7 | 4.4 | 3,531,905.4 |
| Water Area | 0.0 | 1.7 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Piedmont, CA | Burlingame, CA | United States |
| Age 0 to 4 | 5.2% | 6.0% | 5.9% |
| Age 5 to 9 | 6.9% | 6.9% | 6.1% |
| Age 10 to 14 | 9.6% | 6.0% | 6.6% |
| Age 15 to 17 | 5.5% | 3.7% | 3.9% |
| Age 18 to 20 | 3.2% | 1.4% | 4.0% |
| Age 21 to 24 | 1.7% | 2.4% | 5.2% |
| Age 25 to 34 | 5.0% | 13.8% | 13.8% |
| Age 35 to 44 | 12.3% | 16.7% | 12.9% |
| Age 45 to 54 | 19.4% | 15.6% | 12.6% |
| Age 55 to 59 | 6.0% | 5.6% | 6.7% |
| Age 60 to 64 | 4.7% | 6.5% | 6.3% |
| Age 65 to 74 | 13.4% | 7.8% | 9.6% |
| Age 75 to 84 | 3.7% | 4.8% | 4.5% |
| Age 85 and over | 3.3% | 2.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | Piedmont, CA | Burlingame, CA | United States |
| White | 70.7% | 52.2% | 59.4% |
| Black | 1.4% | 1.6% | 12.2% |
| Asian | 20.6% | 27.3% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.1% | 0.1% | 0.2% |
| Other | 0.1% | 0.7% | 0.4% |
| Two or More Races | 3.9% | 3.9% | 3.2% |
| Hispanic | 3.2% | 14.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Piedmont, CA | Burlingame, CA | United States |
| Married Population | 64.3% | 55.4% | 49.8% |
| Currently Married | 63.9% | 54.0% | 48.0% |
| Married but Separated | 0.4% | 1.4% | 1.8% |
| Single Population | 35.7% | 44.6% | 50.2% |
| Never Married | 22.1% | 31.0% | 33.8% |
| Divorced | 8.2% | 7.9% | 10.8% |
| Widowed | 5.4% | 5.7% | 5.6% |
| space5 | | | |
| Household Size | 2.97 | 2.47 | 2.60 |
| Households | 3,821 | 12,418 | 124,010,992 |
| Family Households | 3,075 | 7,641 | 80,755,759 |
| Married couple, w/children | 47.4% | 41.8% | 30.5% |
| Married couple, no children | 39.9% | 42.7% | 42.9% |
| Non Family Households | 746 | 4,777 | 43,255,233 |
| Single householder, w/children | 7.5% | 7.6% | 15.8% |
| Single householder, no children | 5.1% | 7.9% | 10.8% |