The county index for the October 2026 edition lists 131,017,319 property records across 3,142 counties and county equivalents. The 25 largest county files hold 21,496,368 of those records, 16.4% of the national total, although they make up only 0.80% of the counties on the list.
First place belongs to Los Angeles County, California, with 2,275,994 records, or 1.7% of every property record in the country. In 25th place, Cuyahoga County, Ohio, holds 500,430. The county at the top of the table has 4.5 times as many records as the county at the bottom of it.
To make this table in the October 2026 edition, a county needs at least 500,430 records. The next county below the cut, Middlesex County, Massachusetts, has 499,690, 740 fewer than the 25th-place county. Counties close to the line can enter or leave the table from one monthly edition to the next as their files are rebuilt, which is why this page is recalculated rather than written once.
- Records in the top 25
- 21,496,368
- Share of the national total
- 16.4%
- Counties holding half of all records
- 201
- Median county file
- 13,414
| Rank | County | State | FIPS | Records | Share of U.S. | Cumulative |
|---|---|---|---|---|---|---|
| 1 | Los Angeles County | California | 06037 | 2,275,994 | 1.7% | 1.7% |
| 2 | Cook County | Illinois | 17031 | 1,786,262 | 1.4% | 3.1% |
| 3 | Maricopa County | Arizona | 04013 | 1,612,180 | 1.2% | 4.3% |
| 4 | Harris County | Texas | 48201 | 1,496,552 | 1.1% | 5.5% |
| 5 | San Diego County | California | 06073 | 924,807 | 0.71% | 6.2% |
| 6 | Miami-Dade County | Florida | 12086 | 889,277 | 0.68% | 6.9% |
| 7 | Orange County | California | 06059 | 839,615 | 0.64% | 7.5% |
| 8 | Clark County | Nevada | 32003 | 830,142 | 0.63% | 8.1% |
| 9 | Wayne County | Michigan | 26163 | 812,903 | 0.62% | 8.8% |
| 10 | Riverside County | California | 06065 | 795,456 | 0.61% | 9.4% |
| 11 | Dallas County | Texas | 48113 | 782,350 | 0.60% | 10.0% |
| 12 | Broward County | Florida | 12011 | 731,886 | 0.56% | 10.5% |
| 13 | Tarrant County | Texas | 48439 | 711,535 | 0.54% | 11.1% |
| 14 | King County | Washington | 53033 | 696,495 | 0.53% | 11.6% |
| 15 | Bexar County | Texas | 48029 | 687,337 | 0.52% | 12.1% |
| 16 | San Bernardino County | California | 06071 | 684,937 | 0.52% | 12.6% |
| 17 | Palm Beach County | Florida | 12099 | 640,717 | 0.49% | 13.1% |
| 18 | Philadelphia County | Pennsylvania | 42101 | 606,047 | 0.46% | 13.6% |
| 19 | Lee County | Florida | 12071 | 564,993 | 0.43% | 14.0% |
| 20 | Suffolk County | New York | 36103 | 535,064 | 0.41% | 14.4% |
| 21 | Allegheny County | Pennsylvania | 42003 | 533,271 | 0.41% | 14.8% |
| 22 | Queens County | New York | 36081 | 520,910 | 0.40% | 15.2% |
| 23 | Hillsborough | Florida | 12057 | 520,410 | 0.40% | 15.6% |
| 24 | Santa Clara County | California | 06085 | 516,798 | 0.39% | 16.0% |
| 25 | Cuyahoga County | Ohio | 39035 | 500,430 | 0.38% | 16.4% |
Source: county index, one row per property. Shares are of all records in the edition. Ties are ordered by name.
A short head and a long tail
Sorted from largest to smallest, the 3,142 county files form a steep curve. Adding up records county by county from the top, the running total passes half of all records in the edition at the 201st county. Those 201 counties are 6.4% of the list; the remaining 2,941 share the other half between them. Put another way, the single largest file holds more records than the 750 smallest counties in the country combined.
The middle of the list sits far below anything in this ranking. The median county file, the one at the midpoint when every county is lined up by size, holds 13,414 records. Los Angeles County is 170 times that size, and the 25th-place county, Cuyahoga County, is 37 times the median. 4 counties have a million records or more in the October 2026 edition.
The cumulative column in Table 1 shows the same pattern from the top down: read along it to see how much of the national file any number of the largest counties covers. The 5 largest together account for 6.2% of all records, and the full table for 16.4%.
Which states hold the top places
The 25 counties come from 11 states. California has the most places, with 6. 6 states appear once.
| State | Places | Records in those counties | Share of state |
|---|---|---|---|
| California | 6 | 6,037,607 | 53.1% |
| Florida | 5 | 3,347,283 | 33.0% |
| Texas | 4 | 3,677,774 | 31.4% |
| Pennsylvania | 2 | 1,139,318 | 21.3% |
| New York | 2 | 1,055,974 | 18.1% |
| Illinois | 1 | 1,786,262 | 36.4% |
| Arizona | 1 | 1,612,180 | 53.9% |
| Nevada | 1 | 830,142 | 67.8% |
| Michigan | 1 | 812,903 | 18.0% |
| Washington | 1 | 696,495 | 24.3% |
| Ohio | 1 | 500,430 | 10.0% |
“Share of state” is the part of the state’s own record total held by its counties in Table 1.
A state’s showing here depends on how its records are divided among its counties, not only on how many it has. A state whose property is concentrated in one or two large counties can place a county high on this list, while a state of similar size split into many mid-sized counties may place none. The last column of Table 2 shows how much of each listed state’s own total its top-25 counties account for. Nevada gets the largest part of its total from its entries here, 67.8%; in Ohio the figure is 10.0%, a sign of a state whose records are spread across many other counties as well. For every state’s full total, average file size and largest and smallest county, see property records by state.
What the counts measure
Record counts are the measure used here because they are what a buyer receives: the number of rows in the CSV, the number of properties a campaign can reach, and the size of the job of working through a file. They are also the one figure every county page shows before anything is bought, so this ranking can be checked against those pages county by county.
Each record is one property in a county file: a row carrying the property’s address and building facts, its owner and mailing address, estimated value, open loans and tax bill. A county’s count is the number of such rows. It is not a population figure, and on its own it says nothing about land area, sales volume or property values.
Counties are identified by five-digit FIPS code, the federal code that also appears on every row of the file. The list includes county equivalents such as parishes, boroughs and independent cities, which are ranked alongside counties on the same terms; the report on county equivalents explains how they differ. For the other end of the ranking, see the smallest county property files.
The figures on this page come from the October 2026 edition. They are recalculated from the county index every day, so the order can change when a new monthly edition arrives. Counties with equal counts are ordered alphabetically.
Buying from the top of the list
Every county on this site carries the same price, $19/mo for one county’s complete file, whatever its size. For the counties in Table 1, that price covers anywhere from 500,430 to 2,275,994 rows. The five-county bundle, $49/mo for any 5 counties, could take the 5 largest files in the table, 8,095,795 records in all, or any mix of large and small counties from any states.
Each county name in the tables links to that county’s own page, with its record count, its rank within its state, its FIPS code and the columns in its file. Each state name opens the state’s full county list, ordered alphabetically with record counts.
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