Rockville, MD · standard
ZIP Code 20850
Montgomery County, Maryland — Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 46,340
- 1,269/sq mi
- $125,950
- Median income
- $714,400
- Median home value
- 67.5%
- Bachelor's or higher
The verdict
Rockville pairs a top-decile household income with top-decile home values, in a low-density, mixed-tenure area.
- Top 8%
- household income, US ZIPs
- Top 6%
- home value, US ZIPs
- 1,269
- people per sq mi
- 50%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 20850 against every reporting US ZIP.
ZIP code 20850 is classified by USPS as a standard delivery area and covers roughly 36.5 square miles in Rockville, Montgomery County, Maryland. The area is home to 46,340 residents, producing a population density of 1,269 people per square mile, and falls within the New York time zone. These USPS and Census boundary values drive every downstream statistic on this page, including the benchmarks that compare 20850 against Maryland and the nation.
On the economic side, the median household income for ZIP 20850 sits at $125,950 (10% above the Maryland average), while per-capita income is $68,066. The poverty rate stands at 6.9% and the unemployment rate at 4.5%. On housing, the median home value is $714,400 (60% above the state average) with median rent at $2,309 per month, and 50.3% of occupied units are owner-occupied, a direct signal of whether 20850 behaves more like a homeowner neighborhood or a renter-heavy ZIP.
Education and household profile round out the picture: 67.5% of adults hold a bachelor's degree or higher, the median age is 41.2, and the average commute is 30 minutes. We also surface 10 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Montgomery County, so you can benchmark 20850 against its immediate geography rather than a national average alone. Every figure is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates, HUD Fair Market Rents, and FHFA Home Price Index data, no estimates, no proprietary scoring. Verify with HUD →
Top industries in ZIP 20850
Top 5 sectors by establishment count
Which industries have the most business establishments in ZIP 20850.
- Professional, scientific, and technical services
Professional, scientific, and technical services
790 establishments
- Health care and social assistance
Health care and social assistance
440 establishments
- Other services (except public administration) 243
Other services (except public administration)
243 establishments
- Finance and insurance 191
Finance and insurance
191 establishments
- Accommodation and food services 178
Accommodation and food services
178 establishments
What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.
Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + HUD FMR + FHFA HPI ACS demographics, ZBP business establishments, HUD Fair Market Rents, FHFA HPI for ZIP 20850, Rockville, MD · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; HUD FMR + FHFA HPI updated quarterly/annually.
Quick Facts
46,340
Population
36.5
Area (sq mi)
1,269
People / sq mi
New York
Time Zone
standard
ZIP Type
Who lives in ZIP 20850?
41.2
Median Age
45.9%
Male
54.1%
Female
36.1%
Foreign-Born
Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How much do residents earn?
$125,950
Median Household Income
+10% vs state
$68,066
Per Capita Income
6.9%
Poverty Rate
4.5%
Unemployment Rate
30.1 min
Mean Commute Time
How ZIP 20850 ranks nationally
Household income vs. every US ZIP code
Median household income — the full national distribution, with this ZIP marked
$125,950 Top 8% higher than 92% of 30,318 US ZIPs
Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source U.S. Census Bureau — ACS 5-Year Estimates · 2019–2023
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What is the education profile here?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
22,418
Total Housing Units
21,159
Occupied Units
1,259
Vacant Units
2.33
Avg Household Size
Occupancy Type
$714,400
Median Home Value
+60% vs state
$2,309
Median Rent
1996
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How have home values changed over time?
FHFA House Price Index, annual appreciation data based on repeat sales and appraisals
+4.9%
YoY Change (2024)
301
HPI Index (2000 = 100)
+201%
Total Change Since 2000
Home values in ZIP 20850 have increased 4.9% over the past year (2024). Since 2000, this ZIP has seen +201% cumulative appreciation.
| Year | Annual Change | HPI Index |
|---|---|---|
| 2020 | +0.9% | 225 |
| 2021 | +6.3% | 239 |
| 2022 | +12.2% | 268 |
| 2023 | +6.9% | 286 |
| 2024 | +4.9% | 301 |
Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2024. ZIP codes with few transactions may show missing values.
What businesses operate in this ZIP?
Census Bureau data shows 2,728 business establishments in ZIP 20850, employing approximately 61,746 people with a combined annual payroll of $6,310,440,000.
2,728
Businesses
61,746
Employees
$6.3B
Annual Payroll
17
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Professional, scientific, and technical services | 790 | 29.0% |
| Health care and social assistance | 440 | 16.1% |
| Other services (except public administration) | 243 | 8.9% |
| Finance and insurance | 191 | 7.0% |
| Accommodation and food services | 178 | 6.5% |
| Construction | 145 | 5.3% |
| Administrative and support and waste management and remediation services | 141 | 5.2% |
| Retail trade | 126 | 4.6% |
| Real estate and rental and leasing | 123 | 4.5% |
| Wholesale trade | 85 | 3.1% |
| Manufacturing | 58 | 2.1% |
| Information | 54 | 2.0% |
| Educational services | 40 | 1.5% |
| Management of companies and enterprises | 38 | 1.4% |
| Transportation and warehousing | 36 | 1.3% |
| Arts, entertainment, and recreation | 34 | 1.3% |
| Utilities | 4 | 0.1% |
Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.
Nearby ZIP Codes
Want a side-by-side? Compare 20850 vs 20880 →
ZIP 20850 vs its nearest neighbors, by population
Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 20878
Gaithersburg (20878)
62,446 residents
- 20854
Potomac (20854)
49,611 residents
- 20850
Rockville (20850)
46,340 residents
- 20852
Rockville (20852)
40,365 residents
- 20877
Gaithersburg (20877)
34,321 residents
- 20853
Rockville (20853)
29,673 residents
- 20879 24,360
Gaithersburg (20879)
24,360 residents
- 20855 14,295
Derwood (20855)
14,295 residents
- 20851 14,191
Rockville (20851)
14,191 residents
What this shows Among its immediate neighbors, ZIP 20850 ranks #3 by population — useful context the national average alone can't give.
ZIP 20850 vs its nearest neighbors, by median income
Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 20854
Potomac (20854)
$250,001 median income
- 20853
Rockville (20853)
$159,080 median income
- 20855
Derwood (20855)
$149,110 median income
- 20878
Gaithersburg (20878)
$144,313 median income
- 20880
Washington Grove (20880)
$134,583 median income
- 20851
Rockville (20851)
$126,411 median income
- 20850
Rockville (20850)
$125,950 median income
- 20852
Rockville (20852)
$122,472 median income
- 20879
Gaithersburg (20879)
$112,104 median income
What this shows By household income, ZIP 20850 ranks #7 of 9 neighboring ZIPs — local affluence varies block to block, not just metro to metro.
| ZIP Code | City | Population | Distance |
|---|---|---|---|
| 20880 | Washington Grove, MD | 450 | 3.4 mi |
| 20877 | Gaithersburg, MD | 34,321 | 3.4 mi |
| 20851 | Rockville, MD | 14,191 | 3.3 mi |
| 20879 | Gaithersburg, MD | 24,360 | 5.4 mi |
| 20899 | Gaithersburg, MD | 142 | 4.1 mi |
| 20878 | Gaithersburg, MD | 62,446 | 4.1 mi |
| 20855 | Derwood, MD | 14,295 | 4.1 mi |
| 20852 | Rockville, MD | 40,365 | 4.1 mi |
| 20853 | Rockville, MD | 29,673 | 4.7 mi |
| 20854 | Potomac, MD | 49,611 | 4.5 mi |
More ZIP Codes in Montgomery County
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Frequently Asked Questions
What county is ZIP code 20850 in? ▼
What is the population of ZIP code 20850? ▼
What is the median household income in ZIP 20850? ▼
What is the average home value in ZIP 20850? ▼
What is the demographic makeup of ZIP 20850? ▼
How many businesses are in ZIP code 20850? ▼
What are the main industries in ZIP code 20850? ▼
How have home values changed in ZIP code 20850? ▼
What is the education level in ZIP code 20850? ▼
What is the average commute time in ZIP 20850? ▼
What percentage of residents own vs. rent in ZIP 20850? ▼
What is the poverty rate in ZIP code 20850? ▼
ZIP Code Research Guides
Official Data Resources for Rockville, MD
Verify and explore additional data for this area using these official government sources.
Read our methodology to see how this data is sourced, computed, and verified.