Skip to content
Atlas Civica

For researchers

The county-harmonized layer

We collapse each county to one representative code (the longest code within it), so the corpus is comparable county-to-county and weighted toward the law that governs the most people.

3,144
US counties
1,071
With a representative code
79.6%
US population covered

Largest harmonized counties

By sections in the representative code.

CountyState RepresentativeVendor SectionsPopulation
Los Angeles County CA place:0644000 place Municode 13k 9.7M
Santa Clara County CA place:0668000 place Municode 11k 1.9M
Travis County TX place:4805000 place Municode 8.1k 1.3M
Wayne County MI place:2622000 place Municode 8.1k 1.8M
King County WA place:5363000 place Municode 7.7k 2.3M
San Bernardino County CA county:06071 county American Legal 6.8k 2.2M
Hennepin County MN place:2743000 place Municode 5.5k 1.3M
Miami-Dade County FL county:12086 county Municode 5.3k 2.7M
Alameda County CA place:0653000 place Municode 5.2k 1.6M
Franklin County OH place:3918000 place Municode 5.2k 1.3M
Harris County TX place:4835000 place Municode 5.1k 4.8M
Broward County FL county:12011 county Municode 4.9k 2.0M
Suffolk County NY county:36103 county eCode360 4.9k 1.5M
Clark County NV county:32003 county Municode 4.2k 2.3M
Bexar County TX place:4865000 place Municode 4.1k 2.1M
Riverside County CA place:0662000 place Municode 3.7k 2.5M
Orange County FL place:1253000 place Municode 3.6k 1.5M
Tarrant County TX place:4827000 place American Legal 3.5k 2.2M
Hillsborough County FL county:12057 county Municode 3.3k 1.5M
Orange County CA place:0636770 place Municode 3.1k 3.1M
Maricopa County AZ place:0465000 place Municode 3.0k 4.6M
Cook County IL county:17031 county Municode 2.7k 5.1M
Salt Lake County UT place:4967000 place Municode 2.7k 1.2M
Dallas County TX place:4847892 place Municode 2.6k 2.6M
Palm Beach County FL place:1207300 place Municode 2.5k 1.5M
Sacramento County CA place:0613588 place Municode 2.4k 1.6M
San Diego County CA place:0650398 place Municode 2.4k 3.3M
Oakland County MI place:2674900 place Municode 2.0k 1.3M
Cuyahoga County OH place:3908364 place Municode 1.8k 1.2M
Middlesex County MA place:2511000 place Municode 1.8k 1.6M
Nassau County NY place:3633139 place eCode360 1.7k 1.4M
Allegheny County PA place:4250528 place eCode360 1.6k 1.2M
Collin County TX place:4858016 place Municode 1.6k 1.2M
Wake County NC place:3710740 place American Legal 1.4k 1.2M
Mecklenburg County NC place:3712000 place Municode 1.1k 1.2M
Kings County NY 2.6M
Queens County NY 2.3M
New York County NY 1.6M
Philadelphia County PA 1.6M
Bronx County NY 1.4M

County harmonization — one representative code per county (longest-code rule)