ZIP Code 21648 - Madison Maryland
Overview
ZIP Code 21648 is located in Madison Maryland. Portions of 21648 are also in Woolford. 21648 is entirely within Dorchester County. Regionally, 21648 is located in the DELMARVA Region.
ZIP Code 21648 Quick Stats
| ZIP Code Name | Madison |
| Primary County | Dorchester County |
| ZIP Code Type | Standard |
| Population (2022) | 181 |
| Area Code(s) | 410 / 443 / 667 |
| Current Time | EDT |
ZIP Code 21648 Map
21648 Demographics
21648 can be classified socioeconomically as Middle Class class compared to other ZIP Codes in Maryland. The majority race/ethnicity residing in 21648 is White. The current unemployment level in 21648 is 4.4%.
| Population | 181 |
| Population Growth Rate | 0% |
| Population Density | 9 People per Square Mile |
| Total Households | 128 |
| Median Household Income (2021) | $140,694 |
| Current Unemployment Rate (May 2026) | 4.4% |
| Sales Tax Rate (2025) | 6% |
| Majority Race/Ethnicity | White - 74.79% |
21648 Race/Ethnicity Breakdown
| Race/Ethnicity | Total | Percentage |
|---|---|---|
| White | 89 | 74.79% |
| Black | 13 | 10.92% |
| Hispanic | 6 | 5.04% |
| Asian | 11 | 9.24% |
| Native American | 0 | 0% |
| Hawaiian/Pac. Islander | 0 | 0% |
21648 Educational Attainment Levels
| Highest Education Level | Total | Percentage |
|---|---|---|
| Less Than 1 Year of College | 13 | 6.44% |
| Bachelor Degree | 22 | 10.89% |
| High School Diploma | 118 | 58.42% |
| No High School Diploma | 0 | 0% |
| GED or Alternate | 0 | 0% |
| 1 or More Years of College | 39 | 19.31% |
| Associates Degree | 0 | 0% |
| Masters Degree | 10 | 4.95% |
| Professional Degree | 0 | 0% |
| Doctorate Degree | 0 | 0% |
21648 Geography
| Coordinates | 38.48940277, -76.23693085 |
| Adjacent ZIP Codes | |
| Cities/Towns in 21648 | |
| Region | DELMARVA Region |
| Metropolitan/Micropolitan Stat Area | Cambridge, MD |
| Time Zone | Eastern Daylight Time |
| IANA Timezone | America/New_York |
| Area | 21 Square Miles |
21648 Schools
| School Districts in 21648 | |
| Elementary Schools in 21648 | |
| High Schools in 21648 |
21648 Weather and Climate Data
| Plant Hardiness Zone | Zone 7b: 5F to 10F | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Average First Frost Date | October 21 - 31 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Average Last Frost Date | April 1 - 10 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Koppen-Geiger Climate Zone | Cfa - Humid Subtropical Climate | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Ecoregion | 63b - Chesapeake-Pamlico Lowlands and Tidal Marshes | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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