Rankings
Largest counties by population
Official ACS population estimates ranked from largest to smallest.
Data integrity snapshotOfficial sources
Source
FRED
Live series
Labor and GDP
Source
Census
ACS data
Income and housing
Source
BEA
Regional data
State accounts
Source
USAspending
FY awards
Federal flows
Validation statusMetadata verified
Source URLsDataset namesFetch timestampsNull handlingStatic exportIntegrity checks
| Check | Status | Detail |
|---|---|---|
| Source URLs | Pass | Every metric links to its public source. |
| Dataset names | Pass | Displayed metrics include dataset labels. |
| Fetch timestamps | Pass | Pipeline timestamps are included. |
| Null handling | Pass | Unavailable values are explicit. |
| Static export | Pass | Data is bundled at build time. |
| Integrity checks | Pass | Validation runs before build. |
| Rank | Place | Value | Detail |
|---|---|---|---|
| 1 | Los Angeles County, CA | 9,808,667 | Ranked by current ACS population estimate. |
| 2 | Cook County, IL | 5,182,090 | Ranked by current ACS population estimate. |
| 3 | Harris County, TX | 4,838,303 | Ranked by current ACS population estimate. |
| 4 | Maricopa County, AZ | 4,559,748 | Ranked by current ACS population estimate. |
| 5 | San Diego County, CA | 3,288,774 | Ranked by current ACS population estimate. |
| 6 | Orange County, CA | 3,165,820 | Ranked by current ACS population estimate. |
| 7 | Miami-Dade County, FL | 2,738,356 | Ranked by current ACS population estimate. |
| 8 | Kings County, NY | 2,631,580 | Ranked by current ACS population estimate. |
| 9 | Dallas County, TX | 2,621,179 | Ranked by current ACS population estimate. |
| 10 | Riverside County, CA | 2,478,600 | Ranked by current ACS population estimate. |
| 11 | Clark County, NV | 2,329,548 | Ranked by current ACS population estimate. |
| 12 | Queens County, NY | 2,323,052 | Ranked by current ACS population estimate. |
| 13 | King County, WA | 2,287,171 | Ranked by current ACS population estimate. |
| 14 | San Bernardino County, CA | 2,197,104 | Ranked by current ACS population estimate. |
| 15 | Tarrant County, TX | 2,167,390 | Ranked by current ACS population estimate. |
| 16 | Bexar County, TX | 2,067,341 | Ranked by current ACS population estimate. |
| 17 | Broward County, FL | 1,977,129 | Ranked by current ACS population estimate. |
| 18 | Santa Clara County, CA | 1,902,047 | Ranked by current ACS population estimate. |
| 19 | Wayne County, MI | 1,772,259 | Ranked by current ACS population estimate. |
| 20 | Alameda County, CA | 1,649,473 | Ranked by current ACS population estimate. |
| 21 | Middlesex County, MA | 1,638,365 | Ranked by current ACS population estimate. |
| 22 | New York County, NY | 1,629,477 | Ranked by current ACS population estimate. |
| 23 | Sacramento County, CA | 1,594,006 | Ranked by current ACS population estimate. |
| 24 | Philadelphia County, PA | 1,579,706 | Ranked by current ACS population estimate. |
| 25 | Palm Beach County, FL | 1,533,806 | Ranked by current ACS population estimate. |