| Statistic | South Arroyo | Pasadena | California |
| Population | 7,537 | 142,017 | 39,512,223 |
| Population density (sq mi) | 3,656 | 6,185 | 256 |
| Median age | 49.2 | 38.8 | 36.0 |
| Male/Female ratio | 0.9:1 | 0.9:1 | 1.0:1 |
| Married (15yrs & older) | n/a | 49% | 52% |
| Families w/ Kids under 18 | 33% | 38% | 46% |
| Speak English | n/a | 55% | 56% |
| Speak Spanish | n/a | 27% | 29% |
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| Race | South Arroyo | Pasadena | California |
| White | 63.15% | 48.42% | 61.26% |
| Black | 4.39% | 8.35% | 5.85% |
| Asian | 17.03% | 18.13% | 13.85% |
| American Indian | 0.00% | 0.38% | 0.74% |
| Native Hawaiian | 0.00% | 0.21% | 0.39% |
| Mixed race | 11.78% | 8.09% | 4.62% |
| Other race | 3.65% | 16.42% | 13.28% |
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