Median household income (1999): $77,786
Estimated median household income in 2005: $94,399
| This zip code | $94,399 | | Maryland: | $61,592 |
Nearest zip codes: 21754, 21774, 20872, 21771, 20871, 21762.
Housing units in zip code 21770 with a mortgage: 1,307 (181 second mortgage, 257 home equity loan, 9 both second mortgage and home equity loan)
Houses without a mortgage: 221
Median monthly owner costs for units with a mortgage: $1,462
Median monthly owner costs for units without a mortgage: $323
Residents with income below the poverty level in 1999:
| This zip code: | 3.1% | | Whole state: | 8.5% |
Residents with income below 50% of the poverty level in 1999:
| This zip code: | 1.6% | | Whole state: | 4.2% |
Median number of rooms in houses and condos:
| Here: | 8.2 | | State: | 6.9 |
Median number of rooms in apartments:
| Here: | 5.6 | | State: | 4.2 |
Year house built:
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- 1999 to March 2000: 24
- 1995 to 1998: 98
- 1990 to 1994: 196
- 1980 to 1989: 394
- 1970 to 1979: 720
- 1960 to 1969: 164
- 1950 to 1959: 62
- 1940 to 1949: 10
- 1939 or earlier: 54
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Bedrooms in owner-occupied houses in Green Valley, MD (21770):
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- no bedroom: 0
- 1 bedrooms: 18
- 2 bedrooms: 19
- 3 bedrooms: 684
- 4 bedrooms: 757
- 5 or more bedrooms: 159
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Bedrooms in renter-occupied apartments and housing units:
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- no bedroom: 0
- 1 bedrooms: 2
- 2 bedrooms: 33
- 3 bedrooms: 35
- 4 bedrooms: 0
- 5 or more bedrooms: 0
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Vehicles available in 21770 zip code in owner-occupied houses/condos:
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- no vehicle: 18
- 1 vehicle: 219
- 2 vehicles: 796
- 3 vehicles: 435
- 4 vehicles: 149
- 5 or more vehicles: 20
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Vehicles available in renter-occupied apartments:
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- no vehicle: 4
- 1 vehicle: 18
- 2 vehicles: 29
- 3 vehicles: 12
- 4 vehicles: 7
- 5 or more vehicles: 0
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Estimated household income distribution in 2005:

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Estimate of home value of owner-occupied houses/condos in 2005 in zip code 21770:
- $70,000 to $79,999: 9
- $100,000 to $124,999: 47
- $125,000 to $149,999: 154
- $150,000 to $174,999: 361
- $175,000 to $199,999: 287
- $200,000 to $249,999: 422
- $250,000 to $299,999: 136
- $300,000 to $399,999: 100
- $400,000 to $499,999: 12
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Rent paid by renters in 2000 in zip code 21770:
- $400 to $449: 11
- $450 to $499: 4
- $500 to $549: 4
- $600 to $649: 4
- $650 to $699: 9
- $800 to $899: 10
- $900 to $999: 16
- No cash rent: 3
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Estimated median house (or condo) value in 2005 for: - White Non-Hispanic householders: $401,232
- Hispanic or Latino householders: $339,231
Housing units in structures:
- One, detached: 1,682
- One, attached: 4
- Two: 27
- Mobile homes: 9

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Means of transportation to work
- Drove a car alone: 2,293 (87%)
- Carpooled: 241 (9%)
- Worked at home: 111 (4%)
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Travel time to work
- Less than 5 minutes: 29
- 5 to 9 minutes: 119
- 10 to 14 minutes: 146
- 15 to 19 minutes: 179
- 20 to 24 minutes: 243
- 25 to 29 minutes: 133
- 30 to 34 minutes: 327
- 35 to 39 minutes: 138
- 40 to 44 minutes: 327
- 45 to 59 minutes: 482
- 60 to 89 minutes: 318
- 90 or more minutes: 93
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Percentage of zip code residents living and working in this county: 30.9%
Household type by relationship
Households: 5,154
- In family households: 4,824 (1,271 male householders, 153 female householders)
1,345 spouses, 1,775 children (1,674 natural, 8 adopted, 93 stepchildren), 87 grandchildren, 37 brothers or sisters, 19 parents, 90 other relatives, 47 non-relatives
- In nonfamily households: 330 (183 male householders (140 living alone)), 70 female householders (57 living alone)), 77 nonrelatives
- In group quarters: 9 (0 institutionalized population)
Size of family households: 438 2-persons, 299 3-persons, 451 4-persons, 175 5-persons, 33 6-persons, 28 7-or-more-persons.
Size of nonfamily households: 197 1-person, 56 2-persons.
1,485 married couples with children.
111 single-parent households (35 men, 76 women).
97.7% of residents of 21770 zip code speak English at home.
0.5% of residents speak Spanish at home (100% very well).
1.4% of residents speak other Indo-European language at home (86% very well, 14% well).
0.2% of residents speak Asian or Pacific Island language at home (100% very well).
0.2% of residents speak other language at home (100% very well).
Foreign born population: 91 (1.7%)
(47.3% of them are naturalized citizens)
| This zip code: | 1.7% | | Whole state: | 9.8% |
Most common places of birth for the foreign-born residents:
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- United Kingdom (58%)
- Germany (9%)
- Korea (9%)
- South Africa (9%)
- Iran (8%)
- Canada (8%)
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Year of entry for the foreign-born population
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- 1995 to March 2000: 8
- 1990 to 1994: 24
- 1985 to 1989: 8
- 1980 to 1984: 7
- 1975 to 1979: 8
- 1970 to 1974: 7
- 1970 to 1974: 9
- 1965 to 1969: 20
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First ancestries reported:
- German: 763
- Irish: 668
- English: 510
- United States or American: 446
- Other groups: 414
- Italian: 250
- Polish: 120
- Scottish: 118
- Russian: 97
- Scotch-Irish: 83
- European: 81
- French (except Basque): 73
- Greek: 72
- Hungarian: 69
- Swedish: 64
- Swiss: 48
- Canadian: 44
- Dutch: 39
- Yugoslavian: 30
- Czechoslovakian: 26
- Slovak: 19
- British: 17
- Portuguese: 17
- Welsh: 12
- Eastern European: 8
- Subsaharan African:: 8
- South African: 8
- Iranian: 7
- Belgian: 6
- Lithuanian: 6
- Norwegian: 5

Public primary/middle schools in zip code 21770 not listed on the city page:- KEMPTOWN ELEMENTARY (Students: 581; Location: 3456 KEMPTOWN CHURCH RD, MONROVIA, MD; Grades: KG - 05)
- GREEN VALLEY ELEMENTARY (Students: 566; Location: 11501 FINGERBOARD RD, MONROVIA, MD; Grades: KG - 05)
Facitilies with environmental interests located in this zip code:
- KEMPTOWN ELEMENTARY SCHOOL (3456 KEMPTOWN CHURCH ROAD in MONROVIA, MD)
AIR MINOR (AIRS/AFS)
STATE MASTER (Maryland Permits tracking) - NPDES NON-MAJOR
(National Center for Education Statistics) - STATE ID-100915
National Pollutant Discharge Elimination System NON-MAJOR (Tracking pollutant discharge elimination systems) - permit
Business SIC classification: ELEMENTARY AND SECONDARY SCHOOLS
Organizations: FREDERICK COUNTY BOARD OF EDUCATION (SCHOOL DISTRICT)
Alternative names: FREDERICK CO. WATER & SEWERDEP, KEMPTOWN SCHOOL, KEMPTOWN SCHOOL WWTP
- GREEN VALLEY ELEMENTARY SCHOOL (11501 FINGERBOARD ROAD in MONROVIA, MD)
AIR MINOR (AIRS/AFS)
STATE MASTER (Maryland Air Emissions Database) - AIR MINOR
(National Center for Education Statistics) - STATE ID-100913
Business SIC classification: ELEMENTARY AND SECONDARY SCHOOLS
Organizations: FREDERICK COUNTY BOARD OF EDUCATION (SCHOOL DISTRICT)
- AMERICAN TELEPHONE & TELEGRAPH (11026 FINGERBOARD ROAD in MONROVIA, MD)
AIR MINOR (AIRS/AFS)
STATE MASTER (Maryland Permits tracking) - NPDES NON-MAJOR
National Pollutant Discharge Elimination System NON-MAJOR (Tracking pollutant discharge elimination systems) - permit
Conditionally Exempt Small Quantity Generators, less than 100 kg/month of hazardous waste (Resource Conservation and Recovery Act (tracking hazardous waste)) - notification
Business SIC classification: TELEPHONE COMMUNICATIONS, EXCEPT RADIOTELEPHONE
Organizations: OPERNAME (CONTACT/OPERATOR)
, AT & T (CONTACT/OWNER)
Alternative names: A T & T - MONROVIA, AT & T, AT&T-MONROVIA, (WWTP)
- GREEN VALLEY CLEANERS (11791 FINGERBOARD RD in MONROVIA, MD)
AIR MINOR (AIRS/AFS)
STATE MASTER (Maryland Air Emissions Database) - AIR MINOR
Small Quantity Generators, between 100 kg and 1000 kg of hazardous waste/month (Resource Conservation and Recovery Act (tracking hazardous waste)) - notification
Business SIC classification: DRYCLEANING PLANTS, EXCEPT RUG CLEANING
Organizations: OPERNAME (CONTACT/OPERATOR)
, BAHOU ZAKI (CONTACT/OWNER)
- PROSTART PERFORMANCE (4937C GREEN VALLEY RD in MONROVIA, MD)
AIR MINOR (AIRS/AFS)
STATE MASTER (Maryland Air Emissions Database) - AIR MINOR
Small Quantity Generators, between 100 kg and 1000 kg of hazardous waste/month (Resource Conservation and Recovery Act (tracking hazardous waste)) - notification
Business SIC classification: TOP, BODY, AND UPHOLSTERY REPAIR SHOPS AND PAINT SHOPS
Organizations: MT AIRY BLD CO (CONTACT/OWNER)
Alternative names: CLASSIC COACH WORKS INC
- CITGO (11791 FINGERBOARD RD. in MONROVIA, MD)
AIR MINOR (AIRS/AFS)
STATE MASTER (Maryland Air Emissions Database) - AIR MINOR
Business SIC classification: GASOLINE SERVICE STATIONS
Alternative names: CITGO - 11791 FINGERBOARD ROAD
- MONROVIA WWTP (EAST OF GREEN VALLEY ROAD INTERCOASTAL INDUSTRIAL in MONROVIA, MD)
STATE MASTER (Maryland Permits tracking) - NPDES NON-MAJOR
National Pollutant Discharge Elimination System NON-MAJOR (Tracking pollutant discharge elimination systems) - permit
Business SIC classification: SEWERAGE SYSTEMS
Alternative names: FREDERICK CO. WATER & SEWER, MONROVIA WASTEWATER TREATMENT PLANT
- GREEN VALLEY GARAGE (11602 FINGERBOARD ROAD in MONROVIA, MD)
AIR MINOR (AIRS/AFS)
STATE MASTER (Maryland Air Emissions Database) - AIR MINOR
Business SIC classification: GROCERY STORES; GASOLINE SERVICE STATIONS
Alternative names: GREEN VALLEY GARAGE - 11602 FINGERBD
- GREEN WORLD NURSERY SCHOOL (4314 WENDY COURT in MONROVIA, MD)
COMPLIANCE ACTIVITY (Tracking inspections of insecticide, fungicide, and rodenticide, and toxic substances)


Most commonly used house heating fuel:
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- Electricity (63%)
- Fuel oil, kerosene, etc. (21%)
- Utility gas (7%)
- Wood (4%)
- Bottled, tank, or LP gas (3%)
- Other fuel (1%)
- No fuel used (1%)
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Place of birth for U.S.-born residents:
- This state: 2649
- Northeast: 773
- Midwest: 279
- South: 1181
- West: 147
74% of the 21770 zip code residents lived in the same house 5 years ago.
Out of people who lived in different houses, 22% lived in this county.
Out of people who lived in different counties, 81% lived in Maryland.
Population in 1990: 5,033. Population change in the 1990s: +427 (+8.5%).
Year Householders Moved Into Unit:
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Private vs. public school enrollment:
Students in private schools in grades 1 to 8 (elementary and middle school): 76
| Here: | 10.1% | | Maryland: | 14.8% |
Students in private schools in grades 9 to 12 (high school): 22
| Here: | 5.5% | | Maryland: | 13.3% |
Students in private undergraduate colleges: 24
| Here: | 13.6% | | Maryland: | 21.7% |
School Enrollment by Level of School
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Companies with federal contracts located in this zip code:
- EHS SERVICES, INC (4975 TALL OAKS DRIVE in MONROVIA, MD; small business): $242,658 in 5 contracts from 1999 to 2005
Contracts for Maintenance, Repair and Rebuilding of Equipment -- Instruments and Laboratory Equipment, Certifications and Accreditations for products and institutions other than educational institutions, Other Professional Services, Engineering and Technical Services by Navy Signed by year: 2000: $50,000; 2001: $37,994; 2002: $0; 2003: $65,939; 2004: $0; 2005: $39,028; 2006: $0.
Biggest contracts:
$65,939 with Navy for Maintenance, Repair and Rebuilding of Equipment -- Instruments and Laboratory Equipment. Signed on 2003-12-04. Completion date: 2004-09-30.
$50,000 with Navy for Certifications and Accreditations for products and institutions other than educational institutions. Signed on 2000-08-24. Completion date: 2000-10-31.
$49,697, same as above. Signed on 1999-12-16. Completion date: 2000-10-01.
$39,028 with Navy for Other Professional Services. Signed on 2005-01-24. Completion date: 2005-09-30.
- RICHARD ESPINOSA (12102 HARDROCK CIRCLE in MONROVIA, MD; small business)
$5,200 with Navy for Lectures For Training. Signed on 2004-11-19. Completion date: 2004-11-22.
Top industries in this zip code by the number of employees in 2005:
- Health Care and Social Assistance: Child Day Care Services (20-49 employees: 3 establishments, 1-4 employees: 2 establishments)
- Administrative and Support and Waste Management and Remediation Services: Landscaping Services (20-49: 1, 5-9: 1, 1-4: 9)
- Construction: New Single-Family Housing Construction (except Operative Builders) (20-49: 1, 10-19: 1)
- Construction: Plumbing, Heating, and Air-Conditioning Contractors (20-49: 1, 5-9: 1, 1-4: 4)
- Administrative and Support and Waste Management and Remediation Services: Other Services to Buildings and Dwellings (20-49: 1, 5-9: 1, 1-4: 1)
- Construction: Painting and Wall Covering Contractors (10-19: 2, 1-4: 5)
- Construction: Commercial and Institutional Building Construction (10-19: 2, 5-9: 1)
- Professional, Scientific, and Technical Services: Computer Systems Design Services (20-49: 1, 1-4: 1)
- Finance and Insurance: Mortgage and Nonmortgage Loan Brokers (20-49: 1)
- Information: Wired Telecommunications Carriers (10-19: 1, 1-4: 1)
Age and Sex of Sensory-Disabled Residents (Noninstitutionalized)
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Age and Sex of Physically-Disabled Residents (Noninstitutionalized)
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Age and Sex of Mentally-Disabled Residents (Noninstitutionalized)
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Age and Sex of Self-Care Disabled Residents (Noninstitutionalized)
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Age and Sex of Go-Outside-Home Disabled Residents (Noninstitutionalized)
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Age and Sex of Residents with Employment Disability (Noninstitutionalized)
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9 people in homes for the mentally retarded
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