| Roeland Park | Johnson County | Kansas |
| Population, Census, April 1, 2020 | 6,871 | 609,863 | 2,937,880 |
| Persons under 5 years | 7.10% | 5.90% | 6.10% |
| Persons under 18 years | 17.10% | 23.70% | 24.00% |
| Persons 65 years and over | 14.20% | 15.50% | 16.70% |
| Owner-occupied housing unit rate | 71.90% | 69.20% | 66.60% |
| Median value of owner-occupied housing | $211,900 | $294,300 | $164,800 |
| Persons per household | 2.08 | 2.52 | 2.51 |
| High school graduate or higher | 97.70% | 96.30% | 91.60% |
| Bachelor's degree or higher | 52.30% | 56.30% | 34.40% |
| Median household income | $73,984 | $96,059 | $64,521 |