South Florida | |
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Clockwise from top: Downtown Miami seen from Biscayne Bay, South Beach in Miami Beach, Downtown Fort Lauderdale, Mallory Square in Key West, Freedom Tower in Miami, and Anhinga Trail in Everglades National Park | |
| Country | |
| State | |
| Largest city | |
| Population (2020) | |
• Total | 9,484,409 |
South Florida, colloquially shortened to SoFlo, is the southernmost region of the U.S. state of Florida. It is one of Florida's three most commonly mentioned directional regions; the two others are Central Florida and North Florida. South Florida is the southernmost part of the continental United States and the only region of the continental U.S. that includes some areas with a tropical climate.
South Florida is dominated by the Miami metropolitan area, the eight-largest metropolitan region in the nation with 6.39 million residents in the combined statistical area of Miami-Fort Lauderdale-West Palm Beach. South Florida is known for tropical climate, diverse cultural influences and vibrant urban centers, including Downtown Miami, Brickell, Downtown Fort Lauderdale, Las Olas Boulevard and Miami Design District. The region is also known for its lively nightlife, entertainment venues, performing arts enter, such as Adrienne Arsht Center for the Performing Arts in Miami and Broward Center for the Performing Arts in Fort Lauderdale, professional sports team, such as the famous Miami Dolphins, and it also features major business districts and high-rise developments including Brickell City Centre and Las Olas River House. It is a major center for Caribbean and Latin American communities and is home to one of the largest concentrations of Caribbeans in the United States.
Miami-Dade County is the most populous county in both South Florida and the state and serves as the primary hub for international trade, finance, entertainment and tourism. Broward County is the second most populous county in South Florida which serves as the second most busiest hub. It is widely famous for its 954 fast music scene, including DJFrisco954, which is associated with South Florida’s local music culture and regional sound.
As with all vernacular regions, South Florida has no official boundaries or status and is defined differently by different sources. A 2007 study of Florida's regions by Ary Lamme and Raymond K. Oldakowski found that Floridians surveyed identified "South Florida" as comprising the southernmost sections of peninsular Florida, meaning: from Jupiter (the northernmost town in Palm Beach County) southward. That area includes the Miami metropolitan area—defined as Miami-Dade, Broward, and Palm Beach counties—the Florida Keys, and the interior region known as the Glades.
The term South Florida most commonly refers to the Miami metro's tri-county area, interpretations vary on the inclusion of some other parts of Florida within the South Florida region, such as the inclusion of Southwest Florida and the Treasure Coast. Southwest Florida, representing the state's Gulf Coast, has emerged as a directional vernacular region. Respondents from as far northwest as the Tampa Bay area identified their region as being in Central Florida. Confusing the matter further, the University of South Florida, named in part because of its status as the state's southernmost public university at the time of its 1957 founding, is located in Tampa. Florida State Road 70 bisects approximately in the Central Florida region from west to east. However, Tampa is not considered South Florida region.
Enterprise Florida, the state's economic development agency, identifies "Southeast Florida" as one of eight economic regions used by the agency and other state and outside entities, including the Florida Department of Transportation. Some entities alternately designate this region "South Florida". Its definition includes much of the same territory as Lamme and Oldakowski's report, except the Gulf Coast and much of the interior Glades region. It includes Monroe County and the three metropolitan counties of Miami-Dade, Broward, and Palm Beach, as well as the three "Treasure Coast" counties of Indian River, St. Lucie, and Martin to the north.

The demographics of South Florida residents can be segmented as following:
| Population % | Place of birth |
|---|---|
| 32.2% | State of Florida |
| 33.0% | Elsewhere in the U.S. |
| 34.8% | Outside of the U.S. |
Over 87.2% of all foreigners residing in South Florida come from Latin America.
South Florida is politically diverse, with multiple congressional districts in the region supporting both the Democratic and Republican parties. As evidenced by the 2020 United States presidential election, supporters of the Democratic Party are mostly concentrated in urban areas, as well as areas to the west of and including downtown Key West, rural communities surrounding Immokalee, and the areas surrounding Belle Glade, while supporters of the Republican Party reside in the most coastal regions of the Miami area north of Pompano Beach, most of the Everglades, most of the regions between Port St. Lucie and Riviera Beach, Southwest Florida, and a supermajority of the region's inland and rural areas.

Largest cities in South Florida by population:
| City | 2020 population | 2010 population | 2000 population | County |
|---|---|---|---|---|
| Miami | 442,241 | 399,457 | 362,470 | Miami-Dade |
| Hialeah | 223,109 | 224,669 | 226,419 | Miami-Dade |
| Port St. Lucie | 204,851 | 164,603 | 88,769 | St. Lucie |
| Cape Coral | 194,016 | 154,309 | 102,286 | Lee |
| Fort Lauderdale | 182,760 | 165,521 | 152,397 | Broward |
| Pembroke Pines | 171,178 | 154,750 | 137,427 | Broward |
| Hollywood | 153,067 | 140,768 | 139,368 | Broward |
| Miramar | 134,721 | 122,041 | 72,739 | Broward |
| Coral Springs | 134,394 | 121,096 | 117,549 | Broward |
| Miami Gardens | 111,640 | 107,167 | 124,656 | Miami-Dade |
| West Palm Beach | 117,415 | 99,919 | 82,103 | Palm Beach |
| Pompano Beach | 112,046 | 99,845 | 78,191 | Broward |
| Davie | 105,691 | 91,992 | 75,720 | Broward |
| Miami Beach | 82,890 | 87,779 | 87,933 | Miami-Dade |
| Plantation | 91,750 | 84,955 | 82,934 | Broward |
| Sunrise | 97,335 | 84,439 | 85,787 | Broward |
| Boca Raton | 97,422 | 84,392 | 74,764 | Palm Beach |
| Deerfield Beach | 86,859 | 75,018 | 64,585 | Broward |
| Fort Myers | 86,395 | 62,298 | 48,208 | Lee |
| Boynton Beach | 80,380 | 68,217 | 60,389 | Palm Beach |
| Lauderhill | 74,482 | 66,887 | 57,585 | Broward |
| Weston | 68,107 | 65,333 | 49,286 | Broward |
| Delray Beach | 66,846 | 60,522 | 60,020 | Palm Beach |
| Homestead | 80,737 | 60,512 | 31,909 | Miami-Dade |
| Tamarac | 71,897 | 60,427 | 55,588 | Broward |
| North Miami | 60,191 | 58,786 | 59,880 | Miami-Dade |
| Wellington | 61,637 | 56,508 | 38,216 | Palm Beach |
| Jupiter | 61,047 | 55,156 | 39,328 | Palm Beach |
| Margate | 58,712 | 53,284 | 53,909 | Broward |
| Coconut Creek | 57,833 | 52,909 | 43,566 | Broward |
The Miami accent is a regional accent of the American English dialect spoken in South Florida, particularly in Miami-Dade, Broward, Palm Beach, and Monroe counties. The accent was born in central Miami, but has expanded to the rest of South Florida in the decades since the 1960s. The Miami accent is most prevalent in American-born South Floridian youth.
The Miami accent is based on a fairly standard American accent but with some changes very similar to dialects in the Mid-Atlantic (especially the New York area dialect, Northern New Jersey English, and New York Latino English.) Unlike Virginia Piedmont, Coastal Southern American, and Northeast American dialects, the "Miami accent" is rhotic; it also incorporates a rhythm and pronunciation heavily influenced by Spanish (wherein rhythm is syllable-timed).

Lamme and Oldakowski identify several demographic, political, and cultural elements that characterize South Florida and distinguish it from other areas of the state. Many of its differences appear to be driven by its proportionately higher level of migration from the northern U.S. states and from the Caribbean and Latin America, particularly in the densely populated Miami area. Politically, South Florida is more liberal than the rest of the state, but in more recent times it has become more conservative. While less than 10% of people in either North or Central Florida felt their area was liberal, over a third of South Floridians described their region as such. 38% characterized the area as conservative; 26% as moderate. This tracks with South Florida's demographics, and Lamme and Oldakowski's findings parallel Barney Warf and Cynthia Waddell's research on Florida's political geography during the 2000 Presidential election. The economy in South Florida is very similar to that in Central Florida. Compared to the more diversified economy in North Florida, tourism is by far the most significant industry in South and Central Florida, with a much smaller but vibrant agricultural industry.
Lamme and Oldakowski's survey also found some cultural indicators distinguishing South Florida. South Florida is the only region of the state where ethnic foods are as popular as general American cuisine. Floribbean cuisine is a fusion cuisine which developed in South Florida, drawing influence from Floridian, Caribbean, Asian and Latin American cuisines. Additionally, while there was little geographical variation for most styles of music, there was regional variation for both country and Latin music. Country was significantly less popular in South Florida than in North or Central Florida, while Latin was more popular than in the other regions.
The Anthony J. Catanese Center for Urban and Environmental Solutions at Florida Atlantic University notes the unusual growth pattern of South Florida. Unlike many areas with centralized cities surrounded by development, most of South Florida is preserved natural area and designated agricultural reserves, with development restricted to a dense, narrow strip along the coast. The developed area is highly urbanized and increasingly continuous and decentralized, with no particular dominant core cities. The center projects this pattern to continue in the future.

There have been several proposals for partitioning the state of Florida to form a separate state of South Florida. Such proposals have usually been made as political statement rather than serious attempts at secession. Reasons often stated are cultural, ethnic, economic, and financial frustrations with the state government in Tallahassee, which is in North Florida.
In 2008, the North Lauderdale City Commission passed a resolution calling for a new state of South Florida to be formed from Palm Beach, Broward, Miami-Dade and Monroe counties.
In 2014, South Miami's city commission passed a resolution in favor of splitting the state in half, with a northern boundary drawn to include the counties of Brevard, Orange, Polk, Hillsborough, and Pinellas, which roughly includes parts of Tampa Bay and Orlando areas. In total, the proposed State of South Florida would have included 24 counties.
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