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

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

67 counties.

#	County
1	Philadelphia County	78.8%	20.0%
2	Delaware County	61.3%	37.6%
3	Montgomery County	60.9%	38.1%
4	Allegheny County	59.7%	39.4%
5	Chester County	56.7%	42.3%
6	Dauphin County	52.4%	46.5%
7	Lackawanna County	51.0%	48.3%
8	Centre County	50.9%	48.1%
9	Lehigh County	50.7%	48.1%
10	Bucks County	49.5%	49.6%
11	Monroe County	49.1%	49.9%
12	Erie County	49.0%	50.0%
13	Northampton County	48.6%	50.4%
14	Cumberland County	44.6%	54.1%
15	Berks County	43.4%	55.6%
16	Lancaster County	41.5%	57.5%
17	Luzerne County	40.0%	59.2%
18	Beaver County	39.2%	59.9%
19	Montour County	39.0%	60.0%
20	Union County	37.8%	61.2%
21	Pike County	37.6%	61.6%
22	Washington County	36.9%	62.4%
23	York County	36.9%	62.1%
24	Westmoreland County	35.4%	63.8%
25	Mercer County	34.5%	64.6%
26	Columbia County	34.0%	65.0%
27	Lebanon County	33.6%	65.5%
28	Butler County	33.5%	65.7%
29	Lawrence County	32.8%	66.5%
30	Adams County	32.7%	66.4%
31	Carbon County	32.2%	67.0%
32	Wayne County	31.1%	68.2%
33	Wyoming County	31.1%	67.9%
34	Fayette County	30.8%	68.7%
35	Indiana County	30.1%	69.2%
36	Crawford County	30.0%	69.2%
37	Warren County	30.0%	69.2%
38	Cambria County	29.8%	69.5%
39	Northumberland County	29.6%	69.5%
40	Clinton County	29.1%	70.0%
41	Lycoming County	28.8%	70.3%
42	Schuylkill County	28.5%	70.6%
43	Venango County	28.5%	70.6%
44	Franklin County	28.1%	71.1%
45	Blair County	27.9%	71.4%
46	Forest County	27.3%	71.8%
47	Susquehanna County	27.2%	71.9%
48	Greene County	26.6%	71.5%
49	Sullivan County	26.2%	73.1%
50	Elk County	26.1%	73.1%

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