Median household income (1999): $100,358
Estimated median household income in 2005: $113,928
| This zip code | $113,928 | | Massachusetts: | $57,184 |
Nearest zip codes: 02420, 01731, 02451, 02452, 02476, 02453.
Housing units in zip code 02421 with a mortgage: 2,986 (210 second mortgage, 476 home equity loan, 0 both second mortgage and home equity loan)
Houses without a mortgage: 1,428
Median monthly owner costs for units with a mortgage: $2,187
Median monthly owner costs for units without a mortgage: $668
Residents with income below the poverty level in 1999:
| This zip code: | 3.9% | | Whole state: | 9.3% |
Residents with income below 50% of the poverty level in 1999:
| This zip code: | 2.0% | | Whole state: | 4.4% |
Median number of rooms in houses and condos:
| Here: | 7.5 | | State: | 6.4 |
Median number of rooms in apartments:
| Here: | 4.0 | | State: | 4.0 |
Year house built:
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- 1999 to March 2000: 28
- 1995 to 1998: 102
- 1990 to 1994: 190
- 1980 to 1989: 668
- 1970 to 1979: 570
- 1960 to 1969: 923
- 1950 to 1959: 1,350
- 1940 to 1949: 632
- 1939 or earlier: 1,686
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Bedrooms in owner-occupied houses in Lexington, MA (02421):
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- no bedroom: 0
- 1 bedrooms: 64
- 2 bedrooms: 464
- 3 bedrooms: 2,097
- 4 bedrooms: 1,631
- 5 or more bedrooms: 501
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Bedrooms in renter-occupied apartments and housing units:
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- no bedroom: 14
- 1 bedrooms: 397
- 2 bedrooms: 459
- 3 bedrooms: 259
- 4 bedrooms: 108
- 5 or more bedrooms: 21
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Vehicles available in 02421 zip code in owner-occupied houses/condos:
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- no vehicle: 133
- 1 vehicle: 1,057
- 2 vehicles: 2,910
- 3 vehicles: 548
- 4 vehicles: 106
- 5 or more vehicles: 3
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Vehicles available in renter-occupied apartments:
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- no vehicle: 236
- 1 vehicle: 542
- 2 vehicles: 429
- 3 vehicles: 25
- 4 vehicles: 15
- 5 or more vehicles: 11
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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 02421:
- $40,000 to $49,999: 6
- $60,000 to $69,999: 6
- $80,000 to $89,999: 6
- $125,000 to $149,999: 13
- $150,000 to $174,999: 46
- $175,000 to $199,999: 29
- $200,000 to $249,999: 269
- $250,000 to $299,999: 421
- $300,000 to $399,999: 1173
- $400,000 to $499,999: 1048
- $500,000 to $749,999: 1014
- $750,000 to $999,999: 248
- $1,000,000 or more: 135
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Rent paid by renters in 2000 in zip code 02421:
- Less than $100: 14
- $100 to $149: 27
- $150 to $199: 72
- $250 to $299: 19
- $300 to $349: 22
- $350 to $399: 63
- $450 to $499: 7
- $500 to $549: 21
- $550 to $599: 15
- $600 to $649: 8
- $650 to $699: 8
- $700 to $749: 6
- $750 to $799: 25
- $800 to $899: 65
- $900 to $999: 88
- $1,000 to $1,249: 173
- $1,250 to $1,499: 100
- $1,500 to $1,999: 177
- $2,000 or more: 310
- No cash rent: 38
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Median price asked for vacant for-sale houses in 2000: $270,400
Estimated median house (or condo) value in 2005 for: - White Non-Hispanic householders: $749,313
- Black or African American householders: $855,798
- Asian householders: $768,722
- Some other race householders: $244,844
- Two or more races householders: $526,727
- Hispanic or Latino householders: $857,044
Housing units in structures:
- One, detached: 4,833
- One, attached: 225
- Two: 159
- 3 or 4: 226
- 5 to 9: 118
- 10 to 19: 204
- 20 to 49: 83
- 50 or more: 301

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Means of transportation to work
- Drove a car alone: 5,950 (78%)
- Carpooled: 441 (6%)
- Bus or trolley bus: 147 (2%)
- Streetcar or trolley car: 12 (0%)
- Subway or elevated: 356 (5%)
- Railroad: 21 (0%)
- Taxi: 5 (0%)
- Bicycle: 18 (0%)
- Walked: 151 (2%)
- Other means: 26 (0%)
- Worked at home: 510 (7%)
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Travel time to work
- Less than 5 minutes: 105
- 5 to 9 minutes: 626
- 10 to 14 minutes: 985
- 15 to 19 minutes: 871
- 20 to 24 minutes: 996
- 25 to 29 minutes: 473
- 30 to 34 minutes: 1223
- 35 to 39 minutes: 432
- 40 to 44 minutes: 333
- 45 to 59 minutes: 651
- 60 to 89 minutes: 318
- 90 or more minutes: 114
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Percentage of zip code residents living and working in this county: 72.6%
Household type by relationship
Households: 15,834
- In family households: 14,085 (3,442 male householders, 1,122 female householders)
4,001 spouses, 4,901 children (4,638 natural, 208 adopted, 55 stepchildren), 99 grandchildren, 112 brothers or sisters, 120 parents, 168 other relatives, 120 non-relatives
- In nonfamily households: 1,749 (502 male householders (396 living alone)), 1,015 female householders (945 living alone)), 232 nonrelatives
- In group quarters: 405 (171 institutionalized population)
Size of family households: 1,854 2-persons, 1,012 3-persons, 1,168 4-persons, 391 5-persons, 86 6-persons, 53 7-or-more-persons.
Size of nonfamily households: 1,341 1-person, 147 2-persons, 9 3-persons, 17 4-persons, 3 5-persons.
3,656 married couples with children.
432 single-parent households (73 men, 359 women).
82.6% of residents of 02421 zip code speak English at home.
1.5% of residents speak Spanish at home (72% very well, 20% well, 8% not well).
7.9% of residents speak other Indo-European language at home (86% very well, 11% well, 2% not well, 1% not at all).
7.1% of residents speak Asian or Pacific Island language at home (55% very well, 24% well, 19% not well, 2% not at all).
0.9% of residents speak other language at home (71% very well, 4% well, 25% not well).
Foreign born population: 2,730 (16.9%)
(51.7% of them are naturalized citizens)
| This zip code: | 16.9% | | Whole state: | 12.2% |
Most common places of birth for the foreign-born residents:
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- Korea (11%)
- China, excluding Hong Kong and Taiwan (11%)
- India (11%)
- United Kingdom (6%)
- Japan (5%)
- Russia (5%)
- Taiwan (4%)
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Year of entry for the foreign-born population
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- 1995 to March 2000: 625
- 1990 to 1994: 493
- 1985 to 1989: 169
- 1980 to 1984: 217
- 1975 to 1979: 280
- 1970 to 1974: 202
- 1970 to 1974: 198
- 1965 to 1969: 546
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First ancestries reported:
- Other groups: 2631
- Irish: 1967
- Italian: 1582
- English: 1545
- German: 967
- Russian: 665
- United States or American: 577
- Polish: 521
- French (except Basque): 407
- Scottish: 355
- Swedish: 255
- French Canadian: 210
- British: 196
- Eastern European: 178
- Armenian: 176
- Iranian: 145
- European: 138
- Arab:: 129
- Scotch-Irish: 126
- Greek: 110
- Subsaharan African:: 109
- Swiss: 104
- Portuguese: 104
- Canadian: 81
- Lebanese: 71
- Finnish: 70
- Austrian: 63
- Danish: 63
- South African: 58
- Ukrainian: 56
- Northern European: 55
- Dutch: 51
- Norwegian: 50
- Belgian: 42
- Israeli: 40
- Hungarian: 38
- Lithuanian: 37
- Other Subsaharan African: 33
- Guyanese: 30
- Slovene: 29
- Romanian: 28
- Arab/Arabic: 27
- Latvian: 22
- Syrian: 21
- Slovak: 19
- Brazilian: 19
- African: 18
- Welsh: 15
- Basque: 12
- West Indian (excluding Hispanic groups):: 12
- Egyptian: 10
- Slavic: 10
- Alsatian: 9
- Czech: 7
- Cypriot: 7
- Albanian: 6
- Haitian: 6
- Jamaican: 6
- Scandinavian: 6
- Czechoslovakian: 2



Housing units lacking complete plumbing facilities: 0%
Housing units lacking complete kitchen facilities: 1%
Most commonly used house heating fuel:
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- Fuel oil, kerosene, etc. (55%)
- Utility gas (35%)
- Electricity (8%)
- Bottled, tank, or LP gas (1%)
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Place of birth for U.S.-born residents:
- This state: 8556
- Northeast: 2629
- Midwest: 1157
- South: 578
- West: 456
70% of the 02421 zip code residents lived in the same house 5 years ago.
Out of people who lived in different houses, 59% lived in this county.
Out of people who lived in different counties, 31% lived in Massachusetts.
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): 180
| Here: | 8.6% | | Massachusetts: | 10.8% |
Students in private schools in grades 9 to 12 (high school): 85
| Here: | 9.5% | | Massachusetts: | 12.2% |
Students in private undergraduate colleges: 159
| Here: | 48.0% | | Massachusetts: | 48.2% |
School Enrollment by Level of School
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Top industries in this zip code by the number of employees in 2005:
- Professional, Scientific, and Technical Services: Human Resources and Executive Search Consulting Services (over 1000 employees: 1 establishment, 50-99 employees: 1 establishment, 10-19 employees: 2 establishments, 1-4 employees: 8 establishments)
- Professional, Scientific, and Technical Services: Research and Development in the Physical, Engineering, and Life Sciences (250-499: 2, 100-249: 1, 50-99: 3, 20-49: 4, 10-19: 3, 5-9: 2, 1-4: 5)
- Wholesale Trade: Other Electronic Parts and Equipment Merchant Wholesalers (100-249: 3, 1-4: 1)
- Professional, Scientific, and Technical Services: Administrative Management and General Management Consulting Services (100-249: 2, 20-49: 2, 1-4: 22)
- Accommodation and Food Services: Hotels (except Casino Hotels) and Motels (250-499: 1, 50-99: 1)
- Professional, Scientific, and Technical Services: Custom Computer Programming Services (100-249: 1, 20-49: 3, 10-19: 3, 5-9: 3, 1-4: 12)
- Professional, Scientific, and Technical Services: Other Scientific and Technical Consulting Services (100-249: 2, 1-4: 3)
- Management of Companies and Enterprises: Corporate, Subsidiary, and Regional Managing Offices (100-249: 1, 50-99: 1, 20-49: 1, 5-9: 1, 1-4: 4)
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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People in group quarters
- 224 people in nursing homes
- 97 people in other group homes
- 38 people in religious group quarters
- 23 people in homes for the mentally ill
- 23 people in homes for the mentally retarded
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