HomeWashingtonKing CountyBlack Diamond
Black Diamond, Washington: commercial real estate data.
Black Diamond is a Census city of 5,961 people across 6.60 square miles of land, in King County. Median household income is $141,383, 86.0 percent of occupied homes are owned, and the SBA record carries 10 7(a) approvals to borrowers here worth $5.5 m since FY2020.
Underlined figures are computed by MMCG Analytics, not published by the agency.
Black Diamond
What Black Diamond is
- Census place typecity
- Land area6.6 sq mi
- Water area0.59 sq mi
- Population per square mile of land903
- County holding the largest share of its areaKing County, 100.0 percent
US Census Bureau, cartographic boundary file, places, 2024 vintage. US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Black Diamond
How many people live in Black Diamond
- Population5,961
- Median age38.1
- Population under 181,483 plus or minus 318
- Share under 1824.9 percent plus or minus 5.3
- Population 65 and over609 plus or minus 171
- Share 65 and over10.2 percent plus or minus 2.9
- Households2,316
- Family households1,749
- Share of households that are families75.5 percent
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Black Diamond
Income and work in Black Diamond
- Median household income$141,383
- Per capita income$65,562
- Civilian labor force3,398
- Employed3,353
- Unemployed45 plus or minus 43
- Unemployment rate1.3 percent plus or minus 1.3
- Adults 25 and over4,168
- Adults 25 and over with a high school diploma or higher97.7 percent
- Adults 25 and over with a bachelor degree or higher54.7 percent
- Adults 25 and over with a graduate degree17.9 percent plus or minus 5.4
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Black Diamond
Housing in Black Diamond
- Housing units2,442
- Occupied units2,316
- Vacant units126 plus or minus 86
- Vacancy rate5.2 percent plus or minus 3.5
- Owner occupied1,991
- Renter occupied325 plus or minus 127
- Ownership rate86.0 percent
- Median owner-occupied home value$779,100
- Median gross rent, monthly$1,453 plus or minus $1,098
- Annual rent as a share of median income12.3 percent plus or minus 9.4
- Single family units2,200
- Share single family90.1 percent
- Units in buildings of two or more148 plus or minus 111
- Share in buildings of two or more6.1 percent plus or minus 4.5
- Mobile homes63 plus or minus 64
- Median year structure built2000
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Black Diamond
How Black Diamond gets to work
- Workers 16 and over who commute2,453
- Commuting under 15 minutes283 plus or minus 177
- Share commuting under 15 minutes11.5 percent plus or minus 7.1
- Commuting 30 minutes or more1,575 plus or minus 326
- Share commuting 30 minutes or more64.2 percent
- Drove alone63.9 percent
- Carpooled8.9 percent plus or minus 6.8
- Public transport0.2 percent plus or minus 0.5
- Walked0.8 percent plus or minus 0.9
- Worked from home24.9 percent plus or minus 7.2
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Black Diamond
SBA loans in Black Diamond (7(a))
- Approvals10
- Gross approval$5,514,000
- Average approval$551,400
- Median approval$125,000
- Largest approval$3,442,000
- Jobs supported83
- Jobs per approval8.3
- Loans with a final outcome1
- Paid in full1
- Charged off0
- Median term120 months
- Share on real estate terms of 20 years or more10.0 percent
- Share to franchises10.0 percent
- Distinct lenders7
- Distinct industries by NAICS9
Counted by borrower city: approvals to borrowers whose address is in Black Diamond, in any county, FY2020 to FY2026. Only 1 loan has reached a final outcome, fewer than the 30 a charge-off rate needs, so no rate is published.
US Small Business Administration, 7(a) FOIA release, FY2020 to FY2026 year to date, as of 2026-06-30.
Black Diamond
SBA loans in Black Diamond (504)
- Approvals1
- Gross approval$4,030,000
- Average approval$4,030,000
- Median approval$4,030,000
- Largest approval$4,030,000
- Jobs supported5
- Loans with a final outcome0
- Charged off0
- Median term300 months
- Distinct CDCs1
Counted by borrower city: approvals to borrowers whose address is in Black Diamond, in any county, FY2010 to FY2026. Only 0 loans have reached a final outcome, fewer than the 30 a charge-off rate needs, so no rate is published.
US Small Business Administration, 504 FOIA release, FY2010 to FY2026 year to date, as of 2026-06-30.
Black Diamond
Flood risk in Black Diamond
- NFIP communityCity of Black Diamond
- NFIP community number530272
- Participating in the NFIPYes
- Community Rating System classNone
- Currently effective map date08/19/20
The City of Black Diamond participates in the National Flood Insurance Program as community 530272 and carries no Community Rating System class, so no CRS premium discount applies to it.
Federal Emergency Management Agency, NFIP Community Status Book (OpenFEMA), as of 2026-09-26.
King County, not Black Diamond
King County context, not Black Diamond figures
- Establishments in King County70,376
- Covered employment, King County1,449,785
- Average annual pay, King County$132,279
- Housing units permitted, King County10,564
Every figure in this section is published for King County as a whole and is not a measurement of Black Diamond.
US Census Bureau, County Business Patterns, 2023. US Bureau of Labor Statistics, Quarterly Census of Employment and Wages, 2024 annual averages. US Census Bureau, Building Permits Survey, 2024 annual.
Coverage
What this page does not hold.
Parcel detail, zoning and the flood zone at an address are not on this page; they resolve at the address in the platform. How this page was built →
Common questions
Black Diamond questions, answered from the record.
How many people live in Black Diamond, Washington?
5,961, in 2,316 households. Black Diamond city covers 6.60 square miles of land, which is 903 people per square mile. Source: US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
What county is Black Diamond in?
King County, which holds 100.0 percent of the place by area. Source: US Census Bureau, cartographic boundary file, places, 2024 vintage.
What is the median household income in Black Diamond?
$141,383. The median owner-occupied home is valued at $779,100. Median gross rent is $1,453 per month. Source: US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
How much SBA lending goes to Black Diamond businesses?
10 7(a) approvals totaling $5.5 m since FY2020, across 7 lenders, median approval $125,000, plus 1 504 approvals worth $4.0 m since FY2010. These count approvals to borrowers whose address is in Black Diamond, not projects sited inside the place boundary, and they are approvals recorded in the release rather than loans disbursed.
Do SBA loans to Black Diamond borrowers get paid back?
No rate is published for Black Diamond. Only 1 loan has reached a final outcome, fewer than the 30 a charge-off rate needs, so no rate is published. The counts are shown instead.
Is Black Diamond in the National Flood Insurance Program?
Yes. Black Diamond appears in the FEMA Community Status Book as Black Diamond, city of, community 530272, with no Community Rating System class, so no CRS discount applies. Whether a specific parcel sits in a mapped special flood hazard area is an address level question the platform answers.
Are the county figures on this page Black Diamond figures?
No, and they are labeled so. County Business Patterns, QCEW, the Building Permits Survey, BEA product and IRS migration are published for King County as a whole and there is no place level equivalent. They appear in one clearly marked section as context and are never presented as measurements of Black Diamond.
Is zoning published for Black Diamond?
No. Nothing on this page presents parcel level zoning.
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