Editing Loudoun County, Virginia (section)

==Demographics==
{{US Census population
|1790= 18962
|1800= 20523
|1810= 21338
|1820= 22702
|1830= 21939
|1840= 20431
|1850= 22079
|1860= 21774
|1870= 20929
|1880= 23634
|1890= 23274
|1900= 21948
|1910= 21167
|1920= 20577
|1930= 19852
|1940= 20291
|1950= 21147
|1960= 24549
|1970= 37150
|1980= 57427
|1990= 86129
|2000= 169599
|2010= 312311
|2020= 420959
|estref=
|align-fn=center
|footnote=U.S. Decennial Census<ref name="DecennialCensus">{{cite web |url=https://www.census.gov/prod/www/decennial.html |title=Census of Population and Housing from 1790 |publisher=[[US Census Bureau]] |access-date=January 24, 2022}}</ref><br />1790-1960<ref>{{cite web |url=http://mapserver.lib.virginia.edu |title=Historical Census Browser |publisher=University of Virginia Library |access-date=January 2, 2014}}</ref> 1900-1990<ref>{{cite web |url=https://www.census.gov/population/cencounts/va190090.txt |title=Population of Counties by Decennial Census: 1900 to 1990 |publisher=United States Census Bureau |access-date=January 2, 2014}}</ref><br />1990-2000<ref>{{cite web |url=https://www.census.gov/population/www/cen2000/briefs/phc-t4/tables/tab02.pdf |archive-url=https://ghostarchive.org/archive/20221009/https://www.census.gov/population/www/cen2000/briefs/phc-t4/tables/tab02.pdf |archive-date=October 9, 2022 |url-status=live |title=Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000 |publisher=United States Census Bureau |access-date=January 2, 2014}}</ref> 2010<ref name=2010CensusP2/> 2020<ref name=2020CensusP2/>
}}

From 1890 to 1940, the county had a decline in population as people moved to cities for more opportunities.{{citation needed|date=May 2017}} The decline was likely highest among [[African Americans]], who had worked in an [[Agricultural economics|agricultural economy]] that was becoming increasingly mechanized.{{citation needed|date=May 2017}} During the first half of the 20th century, African Americans moved out of rural areas to cities in the [[Great Migration (African American)|Great Migration]].{{citation needed|date=May 2017}} In the 21st century, African Americans now form a proportionally much smaller portion of the county’s population than they once did, and the [[Hispanic and Latino Americans|Hispanic]] and Asian populations of the county outnumber them significantly.

===2020 census===
{| class="wikitable" style="text-align:center;"
|+'''Loudoun County, Virginia – Racial and ethnic composition'''<br><small>{{nobold|''Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos may be of any race.''}}</small>
!Race / Ethnicity <small>(''NH = Non-Hispanic'')</small>
!Pop 1980<ref name=1980CensusP2>{{Cite web|title=1980 census of population.|url=https://www2.census.gov/prod2/decennial/documents/1980/1980censusofpopu80148uns_bw.pdf|website=[[United States Census Bureau]]}}</ref>
!Pop 1990<ref>{{Cite web |title=Virginia: 1990 |url=https://www2.census.gov/library/publications/decennial/1990/cp-1/cp-1-48.pdf |access-date=July 13, 2024}}</ref>
!Pop 2000<ref name=2000CensusP2>{{Cite web |title=P004 Hispanic or Latino, and Not Hispanic or Latino by Race (73) – Loudoun County, Virginia |url=https://data.census.gov/table/DECENNIALSF12000.P004?q=p004&g=050XX00US24033,51107 |website=[[United States Census Bureau]]}}</ref>
!Pop 2010<ref name=2010CensusP2>{{Cite web |title=P2 Hispanic or Latino, and Not Hispanic or Latino by Race – 2010: DEC Redistricting Data (PL 94-171) - Loudoun County, Virginia |url=https://data.census.gov/cedsci/table?q=p2&g=0500000US51107&tid=DECENNIALPL2010.P2 |website=[[United States Census Bureau]]}}</ref>
!{{partial|Pop 2020}}<ref name=2020CensusP2>{{Cite web |title=P2 Hispanic or Latino, and Not Hispanic or Latino by Race – 2020: DEC Redistricting Data (PL 94-171) - Loudoun County, Virginia |url=https://data.census.gov/cedsci/table?q=p2&g=0500000US51107&tid=DECENNIALPL2020.P2 |website=[[United States Census Bureau]]}}</ref>
!% 1980
!% 1990
!% 2000
!% 2010
!{{partial|% 2020}}
|-
|[[Non-Hispanic or Latino whites|White]] alone (NH)
|50,876
|75,557
|134,972
|194,845
|style='background: #ffffe6; |216,865
|{{Percentage|50876|57,427|2}}
|87.73%
|{{Percentage|134972|169599|2}}
|62.39%
|style='background: #ffffe6; |51.52%
|-
|[[Non-Hispanic or Latino African Americans|Black or African American]] alone (NH)
|4,964
|6,126
|11,517
|21,934
|style='background: #ffffe6; |29,725
|{{Percentage|4964|57,427|2}}
|7.11%
|{{Percentage|11517|169599|2}}
|7.02%
|style='background: #ffffe6; |7.06%
|-
|[[Native Americans in the United States|Native American]] or [[Alaska Native]] alone (NH)
|94{{efn|Includes all people who gave "American Indian", "Eskimo", or "Aleut" as their race, regardless of Hispanic identity.}}
|167
|297
|520
|style='background: #ffffe6; |536
|{{Percentage|94|57,427|2}}
|0.19%
|{{Percentage|297|169599|2}}
|0.17%
|style='background: #ffffe6; |0.13%
|-
|[[Asian Americans|Asian]] alone (NH)
|424{{efn|Includes all people who gave "Japanese", "Chinese", "Filipino", "Korean", "Asian Indian", or "Vietnamese" as their race, regardless of Hispanic identity.}}
|2,053
|9,025
|45,795
|style='background: #ffffe6; |89,372
|{{Percentage|424|57,427|2}}
|2.38%
|{{Percentage|9025|169599|2}}
|14.66%
|style='background: #ffffe6; |21.23%
|-
|[[Pacific Islander Americans|Pacific Islander]] alone (NH)
|6{{efn|Includes all people who gave "Hawaiian", "Guamanian", or "Samoan" as their race, regardless of Hispanic identity.}}
|N/A
|93
|143
|style='background: #ffffe6; |227
|{{Percentage|6|57,427|2}}
|N/A
|{{Percentage|93|169599|2}}
|0.05%
|style='background: #ffffe6; |0.05%
|-
|[[Race and ethnicity in the United States census|Some Other Race]] alone (NH)
|210
|70
|367
|808
|style='background: #ffffe6; |2,425
|0.37%
|0.08%
|{{Percentage|367|169599|2}}
|0.26%
|style='background: #ffffe6; |0.58%
|-
|[[Multiracial Americans|Mixed Race or Multi-Racial]] (NH)
|N/A
|N/A
|3,239
|9,690
|style='background: #ffffe6; |22,065
|N/A
|N/A
|{{Percentage|3239|169599|2}}
|3.10%
|style='background: #ffffe6; |5.24%
|-
|[[Hispanic and Latino Americans|Hispanic or Latino]] (any race)
|853
|2,156
|10,089
|38,576
|style='background: #ffffe6; |59,744
|{{Percentage|853|57,427|2}}
|2.50%
|{{Percentage|10089|169599|2}}
|12.35%
|style='background: #ffffe6; |14.19%
|-
|'''Total'''
|'''57,427'''
|'''86,129'''
|'''169,599'''
|'''312,311'''
|style='background: #ffffe6; |'''420,959'''
|'''100.00%'''
|'''100.00%'''
|'''100.00%'''
|'''100.00%'''
|style='background: #ffffe6; |'''100.00%'''
|}

===2000 to 2019===
As of the [[census]] of 2010,<ref name="GR8">{{cite web |url=https://www.census.gov |publisher=[[United States Census Bureau]] |access-date=May 14, 2011 |title=U.S. Census website}}</ref> there were 312,311 people, 104,583 households, and 80,494 families residing in the county. The population density was {{convert|606|PD/sqmi|PD/km2|sp=us|adj=off}}. There were 109,442 housing units at an average density of {{convert|212|/sqmi|/km2|sp=us|adj=off}}. The racial makeup of the county was:
* 68.7% [[White American|White]]
* 14.7% [[Asian American|Asian]] (7.90% [[Indian Americans|Indian]], 1.74% [[Filipino Americans|Filipino]], 1.61% [[Chinese Americans|Chinese]], 1.34% [[Korean Americans|Korean]], 1.22% [[Vietnamese Americans|Vietnamese]], 1.09% [[Pakistani Americans|Pakistani]])
* 7.3% [[African American]]
* 0.3% [[Native Americans in the United States|Native American]]
* 0.1% [[Pacific Islands American|Pacific Islander]]
* 4.9% of some other race
* 4.0% [[Multiracial American|of two or more races]]
* 12.4% of the population were [[Race (United States Census)|Hispanic]] or [[Race (United States Census)|Latino]] of any race (3.4% [[Salvadoran Americans|Salvadoran]], 1.8% [[Mexican Americans|Mexican]], 1.3% [[Peruvian Americans|Peruvian]], 0.9% [[Stateside Puerto Ricans|Puerto Rican]], 0.6% [[Honduran Americans|Honduran]], 0.6% [[Bolivian Americans|Bolivian]], 0.5% [[Guatemalan Americans|Guatemalan]], 0.5% [[Colombian Americans|Colombian]])

According to the [[2010 United States Census|2010 census]], 10.5% of residents reported being of [[German American|German]] ancestry, while 9.1% reported [[Irish American|Irish]], 7.7% [[English American|English]], 5.4% [[Italian American|Italian]] and 5.2% [[American ethnicity|American]] ancestry.

The most spoken languages other than English in Loudoun County as of 2018 were [[Spanish language|Spanish]], spoken by 10.8% of the population, and [[Telugu language|Telugu]], spoken by 2.8% of the population.<ref>{{Cite web |title=Loudoun County, VA {{!}} Data USA |url=https://datausa.io/profile/geo/loudoun-county-va#:~:text=The%20most%20common%20foreign%20languages,and%20Hindi%20(8,491%20speakers). |access-date=April 4, 2021 |website=datausa.io |language=en}}</ref>{{Citation needed|reason=''This information is not verifiable using the source provided''|date=March 2025}} Almost 25% of Loudoun County residents were born outside of the United States, with the largest number of foreign-born residents being from [[El Salvador]], [[India]], and [[Mexico]].<ref>{{Cite web |title=Loudoun County, VA {{!}} Data USA |url=https://datausa.io/profile/geo/loudoun-county-va#:~:text=The%20most%20common%20foreign%20languages,and%20Hindi%20(8,491%20speakers). |access-date=March 27, 2025 |website=datausa.io |language=en}}</ref>

As of 2000, there were 59,900 households, out of which 43.10% had children under the age of 18 living with them, 64.30% were [[Marriage|married couples]] living together, 7.80% had a female householder with no husband present, and 24.80% were non-families. 18.40% of all households were made up of individuals, and 3.70% had someone living alone who was 65 years of age or older. The average household size was 2.82, and the average family size was 3.24.

In the county, 29.80% of the population was under the age of 18, 5.70% was from 18 to 24, 38.90% from 25 to 44, 20.00% from 45 to 64, and 5.60% was 65 years of age or older. The median age was 34 years. For every 100 females, there were 97.80 males. For every 100 females age 18 and over, there were 95.50 males.

In 2011, census survey data concluded that Loudoun County had the highest median income in the country at $119,134.<ref name=acs2011>{{cite web |title=LOUDOUN COUNTY INCOME HIGHLIGHTS, AMERICAN COMMUNITY SURVEY, 2011 ACS UPDATE |url=http://www.loudoun.gov/DocumentCenter/Home/View/9701 |publisher=Loudoun County Department of Planning |access-date=March 26, 2014}}</ref>

From 1980 to 2014, deaths from [[cancer]] in Loudoun County decreased by 46 percent, the largest such decrease of any county in the United States.<ref>Barry-Jester, Anna Maria. "[https://fivethirtyeight.com/features/how-americans-die-may-depend-on-where-they-live/?ex_cid=story-twitter How Americans Die May Depend On Where They Live]". ''[[FiveThirtyEight]]''. December 13, 2016.</ref>

From 2017 to 2018, Loudoun County saw an increase of 18.5% of households experiencing homelessness, a 21% increase for single adults, and a 36% increase for families. Homelessness for veterans in the county decreased by 16% from 2017 to 2018.<ref>{{Cite news |url=https://www.loudountimes.com/news/on-the-brink-homelessness-on-the-rise-in-loudoun-county/article_cf8bb372-5f80-11e8-81ff-2ba9d1196016.html |title=On the brink: Homelessness on the rise in Loudoun County |last=Baratko |first=Trevor |date=May 25, 2018 |work=LoudounTimes.com |access-date=May 25, 2018 |language=en}}</ref>