| Population | 327 |
| Square Miles | 20.19 |
| Population Density | 16.20 |
| Median Age | 45 |
| Median Household Income | $40,515 |
| Per Capita Income | $31,052 |
| Median Rent | $422 |
| Percent Renters | 11% |
| Median Madison, MD 21648 For Sale Price: | $499,900 |
| Studio For Sale Median Price: | $475,000 |
| 2 Bedroom For Sale Median Price: | $143,900 |
| 3 Bedroom For Sale Median Price: | $499,900 |
| 4 Bedroom For Sale Median Price: | $615,450 |