ZIP Code 21723 - Cooksville Maryland
Overview
ZIP Code 21723 is located in Cooksville Maryland. 21723 is entirely within Howard County. Regionally, 21723 is located in Metro Baltimore.
ZIP Code 21723 Quick Stats
| ZIP Code Name | Cooksville |
| Primary County | Howard County |
| ZIP Code Type | Standard |
| Population (2022) | 689 |
| Area Code(s) | 410 / 443 / 667 |
| Current Time | EDT |
ZIP Code 21723 Map
21723 Demographics
21723 can be classified socioeconomically as Upper Middle Class class compared to other ZIP Codes in Maryland based on Median Household Income and Average Adjusted Gross Income. The majority race/ethnicity residing in 21723 is White. The current unemployment level in 21723 is 4.4%.
| Population | 689 |
| Population Growth Rate | 13.28% |
| Population Density | 220 People per Square Mile |
| Total Households | 247 |
| Percentage High Income Households | 21.5% |
| Median Household Income (2021) | $247,284 |
| Average Adjusted Gross Income (2021) | $448,280 |
| Current Unemployment Rate (May 2026) | 4.4% |
| Sales Tax Rate (2025) | 6% |
| Majority Race/Ethnicity | White - 67.17% |
21723 Race/Ethnicity Breakdown
| Race/Ethnicity | Total | Percentage |
|---|---|---|
| White | 487 | 67.17% |
| Black | 15 | 2.07% |
| Hispanic | 0 | 0% |
| Asian | 223 | 30.76% |
| Native American | 0 | 0% |
| Hawaiian/Pac. Islander | 0 | 0% |
21723 Educational Attainment Levels
| Highest Education Level | Total | Percentage |
|---|---|---|
| Less Than 1 Year of College | 27 | 5.06% |
| Bachelor Degree | 243 | 45.51% |
| High School Diploma | 106 | 19.85% |
| No High School Diploma | 20 | 3.75% |
| GED or Alternate | 11 | 2.06% |
| 1 or More Years of College | 21 | 3.93% |
| Associates Degree | 11 | 2.06% |
| Masters Degree | 85 | 15.92% |
| Professional Degree | 10 | 1.87% |
| Doctorate Degree | 0 | 0% |
21723 Geography
| Coordinates | 39.32902145, -77.00933075 |
| Adjacent ZIP Codes | |
| Region | Metro Baltimore |
| Metropolitan/Micropolitan Stat Area | Baltimore-Columbia-Towson, MD |
| Time Zone | Eastern Daylight Time |
| IANA Timezone | America/New_York |
| Area | 3 Square Miles |
21723 Schools
| School Districts in 21723 | |
| Elementary Schools in 21723 | |
| Middle Schools in 21723 | |
| High Schools in 21723 |
21723 Weather and Climate Data
| Plant Hardiness Zone | Zone 7a: 0F to 5F | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Average First Frost Date | October 11 - 20 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Average Last Frost Date | April 21 - 31 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Koppen-Geiger Climate Zone | Dfa - Humid Continental Hot Summers | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Ecoregion | 64c - Piedmont Uplands | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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