Editing Nassau County, New York (section)

===Politics===
{{Main|Politics of Long Island}}
{{PresHead|place=Nassau County, New York|source=<ref>{{Cite web|url=http://uselectionatlas.org/RESULTS/|title=Dave Leip's Atlas of U.S. Presidential Elections|last=Leip|first=David|website=uselectionatlas.org|access-date=October 23, 2018|archive-date=September 19, 2019|archive-url=https://web.archive.org/web/20190919054213/https://uselectionatlas.org/RESULTS/|url-status=live}}</ref>}}
<!-- PresRow should be {{PresRow|Year|Winning party|GOP vote #|Dem vote #|3rd party vote #|State}} -->
{{PresRow|2024|Republican|368,117|338,424|9,124|New York}}
{{PresRow|2020|Democratic|326,716|396,504|9,536|New York}}
{{PresRow|2016|Democratic|292,025|332,154|22,943|New York}}
{{PresRow|2012|Democratic|259,308|302,695|6,148|New York}}
{{PresRow|2008|Democratic|288,776|342,185|4,657|New York}}
{{PresRow|2004|Democratic|288,355|323,070|6,918|New York}}
{{PresRow|2000|Democratic|227,060|342,226|21,153|New York}}
{{PresRow|1996|Democratic|196,820|303,587|44,257|New York}}
{{PresRow|1992|Democratic|246,881|282,593|79,852|New York}}
{{PresRow|1988|Republican|337,430|250,130|4,858|New York}}
{{PresRow|1984|Republican|392,017|240,697|1,349|New York}}
{{PresRow|1980|Republican|333,567|207,602|54,851|New York}}
{{PresRow|1976|Republican|329,176|302,869|3,711|New York}}
{{PresRow|1972|Republican|438,723|252,831|1,473|New York}}
{{PresRow|1968|Republican|329,792|278,599|34,804|New York}}
{{PresRow|1964|Democratic|248,886|382,590|639|New York}}
{{PresRow|1960|Republican|324,255|263,303|761|New York}}
{{PresRow|1956|Republican|372,358|166,646|0|New York}}
{{PresRow|1952|Republican|305,900|130,267|1,669|New York}}
{{PresRow|1948|Republican|184,284|70,492|10,462|New York}}
{{PresRow|1944|Republican|159,713|78,512|576|New York}}
{{PresRow|1940|Republican|143,672|73,171|450|New York}}
{{PresRow|1936|Republican|94,968|74,232|3,579|New York}}
{{PresRow|1932|Republican|78,544|61,752|3,804|New York}}
{{PresRow|1928|Republican|71,015|40,079|2,046|New York}}
{{PresRow|1924|Republican|45,825|14,322|4,884|New York}}
{{PresRow|1920|Republican|33,099|8,595|1,637|New York}}
{{PresRow|1916|Republican|13,910|8,430|215|New York}}
{{PresRow|1912|Democratic|4,608|7,073|6,865|New York}}
{{PresRow|1908|Republican|9,787|4,883|855|New York}}
{{PresRow|1904|Republican|8,222|5,282|195|New York}}
{{PresRow|1900|Republican|6,994|4,325|141|New York}}
|}

For most of the twentieth century, residents of Nassau County and neighboring [[Suffolk County, New York|Suffolk County]] primarily supported the Republican Party in national elections. In presidential elections during the first half of the century, the Republican candidate often received more than twice as many votes as the Democratic candidate. Between the county's incorporation in 1899 and the 1980s, Democrats only won Nassau County in the elections of [[1912 United States presidential election in New York|1912]] (where [[Theodore Roosevelt]]'s [[Progressive Party (United States, 1912–1920)|Progressive Party]] split the Republican vote) and [[1964 United States presidential election in New York|1964]] (where [[Lyndon B. Johnson]] won in a landslide).

The county began trending Democratic in the 1990s, like many of New York City's suburbs. Until 2024, it had voted for a Democrat in every presidential election since 1992. [[Bill Clinton]] carried the county in [[1992 United States presidential election in New York|1992]] and [[1996 United States presidential election in New York|1996]], as did [[Al Gore]] in [[2000 United States presidential election in New York|2000]], the latter two times by margins of nearly 20 points. [[John Kerry]]'s margin in Nassau County was considerably slimmer (5.6%) in [[2004 United States presidential election in New York|2004]], as he won the towns of Hempstead and North Hempstead but lost the town of Oyster Bay. The county went solidly for [[Barack Obama]] in [[2008 United States presidential election in New York|2008]] and [[2012 United States presidential election in New York|2012]], both times by around 8%. [[Hillary Clinton]] did marginally worse in [[2016 United States presidential election in New York|2016]], winning by 6.2%. [[Joe Biden]] in [[2020 United States presidential election in New York|2020]] fared better than Obama at 9.5%, but still not as well as Bill Clinton and Gore. Although the county leaned Democratic for the last 30 years on the national level, Democrats failed to win the county in the 2024 presidential election. [[Donald Trump]] earned 4.15% more of the county's votes, the first time Nassau was won by a Republican presidential candidate since [[1988 United States presidential election|1988]].<ref>{{Cite web |last=LaRocco |first=Paul |date=2024-11-12 |title=Map: How Long Island voted for president in Harris-Trump race |url=https://www.newsday.com/long-island/politics/elections/trump-harris-election-results-uuvmm1tu |access-date=2024-11-12 |website=Newsday |language=en}}</ref>

Democratic strength is chiefly concentrated in both the wealthier and lower income sections of the county. Liberal voters dominate many of the wealthy communities of the North Shore, particularly in the [[North Hempstead, New York|Town of North Hempstead]] where affluent villages such as [[Sands Point, New York|Sands Point]], [[Old Westbury, New York|Old Westbury]], [[Roslyn, New York|Roslyn]], [[Kensington, New York|Kensington]], [[Thomaston, New York|Thomaston]], [[Great Neck Plaza, New York|Great Neck Plaza]], and [[Great Neck Estates, New York|Great Neck Estates]] as well as the neighboring City of [[Glen Cove, New York|Glen Cove]] vote consistently Democratic. Democratic strongholds also include several low income municipalities in the central portion of the county, such as the [[Hempstead (village), New York|Village of Hempstead]], [[Roosevelt, New York|Roosevelt]], [[Uniondale, New York|Uniondale]] and [[New Cassel, New York|New Cassel]], as well as in a few waterfront communities on the South Shore, such as the City of [[Long Beach, New York|Long Beach]] and the Village of [[Freeport, New York|Freeport]].

Republican voters are primarily concentrated in the middle to upper middle class southeastern portion of the county, which developed during the "post-war boom era". Heavily Republican communities such as [[Massapequa, New York|Massapequa]], [[Massapequa Park, New York|Massapequa Park]], [[Seaford, New York|Seaford]], [[Wantagh, New York|Wantagh]], [[Levittown, New York|Levittown]], [[Bethpage, New York|Bethpage]], and [[Farmingdale, New York|Farmingdale]] are the political base of many county GOP officials such as former Congressman [[Peter T. King]] and former County Executive [[Edward P. Mangano]]. In the western portion of the county, wealthy [[Garden City, New York|Garden City]] is solidly Republican, as is the middle-class community of [[Floral Park, New York|Floral Park]]. Additionally, some of the more rustic areas of the North Shore, particularly in the Town of [[Oyster Bay, New York|Oyster Bay]] usually vote for the GOP.

Areas of the county containing large numbers of swing voters include [[East Meadow, New York|East Meadow]], [[Oceanside, New York|Oceanside]], and [[Rockville Centre, New York|Rockville Centre]] on the South Shore and [[Mineola, New York|Mineola]] on the North Shore. Several areas have changed in partisan affiliation. Formerly Democratic strongholds such as the [[Five Towns]] and parts of [[Great Neck, New York|Great Neck]] have trended to the GOP while previously Republican areas such as [[Elmont, New York|Elmont]], [[Valley Stream, New York|Valley Stream]] and [[Baldwin, Nassau County, New York|Baldwin]] have become Democratic bastions.