Which U.S. county has the most people?

Los Angeles County, California, with 9,808,667 people (Census Bureau, American Community Survey 2020–2024).

Which large county has the highest median household income?

Among the 620 counties of 100,000 people or more: Loudoun County, Virginia, $181,765 (American Community Survey 2020–2024).

Which large county has the highest share of people without health insurance?

Among counties of 100,000 or more: Hidalgo County, Texas, 28.2% (American Community Survey 2020–2024).

How does "places like mine" work?

Pick a place and the figures to compare on. Each figure is put on the same scale (how far a place is from the average, in standard deviations; money and population on a log scale), and the places with the smallest overall difference are listed. It's a comparison of published figures, nothing more.

Compare places on official figures

Every U.S. state, county and congressional district on the figures the Census Bureau, the Bureau of Labor Statistics and the FBI publish, and on certified election results since 2000 (past results): sort and filter them, chart any two figures against each other, or find the places most like yours. Every link keeps your view, so you can share exactly what you see.

Places

Figures

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Missouri counties by Democratic share of the 2024 presidential vote, highest first

115 counties.

#	County
1	St. Louis city	81.2%	16.6%
2	St. Louis County	60.8%	37.4%
3	Boone County	53.8%	44.0%
4	Platte County	47.7%	50.8%
5	Jackson County	47.2%	51.3%
6	Clay County	46.4%	52.0%
7	St. Charles County	40.8%	57.7%
8	Greene County	38.9%	59.7%
9	Buchanan County	35.2%	63.2%
10	Cass County	33.3%	65.4%
11	Adair County	32.6%	66.1%
12	Cole County	32.1%	66.5%
13	Jefferson County	31.0%	67.7%
14	Johnson County	29.5%	69.1%
15	Saline County	29.2%	69.6%
16	Phelps County	27.9%	70.8%
17	Callaway County	27.6%	70.9%
18	Nodaway County	27.6%	71.3%
19	Howard County	27.1%	71.3%
20	Ste. Genevieve County	26.9%	71.9%
21	Cooper County	26.6%	72.4%
22	Franklin County	26.5%	72.3%
23	Cape Girardeau County	26.2%	72.6%
24	Jasper County	25.9%	72.6%
25	Audrain County	25.5%	73.2%
26	Clinton County	25.4%	73.3%
27	Pemiscot County	25.3%	74.3%
28	Ray County	25.1%	73.8%
29	Lafayette County	24.9%	73.7%
30	Pettis County	24.9%	73.7%
31	Warren County	24.7%	74.2%
32	Pulaski County	24.2%	74.5%
33	St. Francois County	23.8%	75.2%
34	Andrew County	23.5%	75.2%
35	Christian County	23.3%	75.6%
36	Randolph County	23.3%	75.5%
37	Henry County	23.2%	75.8%
38	Marion County	23.1%	76.0%
39	New Madrid County	22.9%	76.4%
40	Mississippi County	22.8%	76.5%
41	Camden County	22.4%	76.7%
42	Lincoln County	21.5%	77.4%
43	Chariton County	21.4%	77.7%
44	Linn County	20.8%	78.0%
45	Livingston County	20.7%	78.5%
46	Pike County	20.7%	78.6%
47	Newton County	20.2%	78.8%
48	Scott County	20.2%	79.1%
49	Benton County	20.1%	79.2%
50	Ralls County	20.0%	79.2%

Where these figures come from

Census Bureau, American Community Survey 2020–2024 (5-year estimates): people, age, income, poverty, college degrees, home values, health insurance, housing costs, birthplace, veterans, race and Hispanic origin. Each is an estimate with a margin of error, wider for small counties.
Bureau of Labor Statistics, Local Area Unemployment Statistics: the unemployment rate for September 2026 (preliminary), not seasonally adjusted (the only way BLS publishes counties; states are shown the same way so they compare).
FBI: violent and property crimes reported to police per 100,000 residents. States: the FBI's estimates. Counties: the latest year every police agency in the county reported all 12 months, shown beside the figure, so years differ between counties. Sworn officers per 1,000 residents from the FBI's Law Enforcement Employees count.
Census of Governments 2022: local governments in each county: the county itself, cities and towns, townships, school districts and special districts.
Election results: each party's candidate's share of all votes cast, write-ins included. The presidential vote by state is the Federal Election Commission's compilation of each state's certified results (2004–2024; 2000 adds up the counties); by county, the MIT Election Data and Science Lab's County Presidential Election Returns 2000–2024, from official results (Alaska reports by state House district and Connecticut's figures are by its eight former counties, so Alaska's boroughs and Connecticut's planning regions have none). The 2024 U.S. House vote by district is from the same lab, on the districts as drawn in 2024. A district where only one party's candidate ran shows that candidate's share and none for the other. Every candidate and vote total →
Reading a comparison: these are published figures, shown as published. "Highest" and "lowest" describe the numbers, not how good a place is, and two figures that move together don't show that one causes the other.

Every figure is also on each place's own page. All sources · Methodology

Quick answers

Which U.S. county has the most people?: Los Angeles County, California, with 9,808,667 people (Census Bureau, American Community Survey 2020–2024).
Which large county has the highest median household income?: Among the 620 counties of 100,000 people or more: Loudoun County, Virginia, $181,765 (American Community Survey 2020–2024).
Which large county has the highest share of people without health insurance?: Among counties of 100,000 or more: Hidalgo County, Texas, 28.2% (American Community Survey 2020–2024).
How does "places like mine" work?: Pick a place and the figures to compare on. Each figure is put on the same scale (how far a place is from the average, in standard deviations; money and population on a log scale), and the places with the smallest overall difference are listed. It's a comparison of published figures, nothing more.

See something wrong on this page? Report a problem · Corrections