27 ZIP Code Tabulation Areas in St. Mary's County, Maryland. The population-weighted median household income is about $125,163, the median home value about $414,825, and 73.6% of occupied homes are owner-occupied.
- 27
- ZIP codes
- 118.7K
- Population
- 53
- Data points
St. Mary's County at a glance
- $125,163
- Median household income
- $414,825
- Median home value
- 38.3
- Median age
- 73.6%
- Owner-occupied
- 47,415
- Housing units
Income, home value, and age are population-weighted averages of the ZIP-level medians in the file. Counts are exact.
Top 5 St. Mary's County ZIP codes by median household income| # | ZIP | City | Population | Homeowner % | Median HH $ |
|---|
| 1 | 20630 | — | 559 | 75.1% | $233,411 |
| 2 | 20692 | Tall Timbers | 505 | 100% | $201,250 |
| 3 | 20684 | — | 802 | 93% | $180,060 |
| 4 | 20674 | Piney Point | 769 | 87.6% | $171,985 |
| 5 | 20620 | Callaway | 1,115 | 96.4% | $165,972 |
Top 5 St. Mary's County ZIP codes by population| # | ZIP | City | Population | Homeowner % | Median HH $ |
|---|
| 1 | 20653 | California | 26,852 | 57.4% | $103,048 |
| 2 | 20659 | Charlotte Hall | 24,324 | 88.6% | $121,654 |
| 3 | 20650 | Callaway | 16,094 | 78.7% | $143,116 |
| 4 | 20619 | California | 14,212 | 64.5% | $119,432 |
| 5 | 20636 | — | 10,486 | 87.8% | $163,690 |
Top 5 St. Mary's County ZIP codes by Homeowner GDP| # | ZIP | City | Population | Homeowner % | Median HH $ | Homeowner GDP |
|---|
| 1 | 20659 | Charlotte Hall | 24,324 | 88.6% | $121,654 | $894.8M |
| 2 | 20653 | California | 26,852 | 57.4% | $103,048 | $652.7M |
| 3 | 20650 | Callaway | 16,094 | 78.7% | $143,116 | $635.6M |
| 4 | 20636 | — | 10,486 | 87.8% | $163,690 | $477.5M |
| 5 | 20619 | California | 14,212 | 64.5% | $119,432 | $440.6M |
Homeowner GDP = owner-occupied units × median household income — a proxy for aggregate homeowner spending power in a ZIP, useful for scoring market opportunity. Not an official economic statistic.
Densest: 20686 at 3,582 people/sq mi. Least dense: 20660 at 16 people/sq mi.
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