As of the census of 2000, there were 16,642 people, 7,089 households, and 4,345 families residing in the CDP. The population density was 5,973.2 people per square mile. There were 8,035 housing units at an average density of 2,883.9/sq mi. The racial makeup of the CDP was 85.09% White 7.05% African American, 0.13% Native American, 1.74% Asian, 0.04% Pacific Islander, 3.08% from other races, and 2.86% from two or more races. Hispanic or Latino of any race were 30.60% of the population. There were 7,089 households out of which 27.6% had children under the age of 18 living with them, 46.2% were married couples living together, 11.3% had a female householder with no husband present, and 38.7% were non-families. Of all households, 33.1% were made up of individuals and 16.5% had someone living alone who was 65 years of age or older. The average household size was 2.33 and the average family size was 2.98. In the CDP, the population was spread out with 21.5% under the age of 18, 6.4% from 18 to 24, 26.9% from 25 to 44, 25.6% from 45 to 64, and 19.5% who were 65 years of age or older. The median age was 42 years. For every 100 females, there were 87.3 males. For every 100 females age 18 and over, there were 83.0 males. The median income for a household in the CDP was $33,294, and the median income for a family was $41,693. Males had a median income of $34,773 versus $28,781 for females. The per capita income for the CDP was $25,392. About 11.1% of families and 13.5% of the population were below the poverty line, including 14.2% of those under age 18 and 15.8% of those age 65 or over. As of 2000, speakers of English as a first language accounted for 47.42% of residents, while Spanish made up 32.70%, Russian was at 3.35%, Yiddish was at 2.96%, Hebrew at 2.92%, and the mother tongue of French Creole was 2.41% of the population's speakers. Both Portuguese and French tied with 2.11% of the populace. Arabic made up 0.74% of speakers, while both Chinese and German were spoken by 0.55% of all residents. Also, both Greek and Hungarian were a mother tongue of 0.52% of the population. As of 2000, Ojus had the fifty-sixth-highest percentage of Cuban residents in the US, with 6.77% of the populace. It had the thirty-fifth-highest percentage of Colombian residents in the US, at 3.71% of the population, and the fifty-first-highest percentage of Haitian residents in the US, at 3.0% of its population It also had the nineteenth-most Peruvians in the US, at 2.29%, while it had the twentieth-highest percentage of Brazilians, at 1.60% of all residents Ojus's Israeli community had the seventeenth-highest percentage of residents, which was at 1.70% It is also home to the 113th-highest percentage of Dominican residents in the US, at 1.42% of the population, while its Romanian community was the twenty-first-highest percentage in the US, and accounted for 1.0% of all residents
People have been living in the Ojus area for thousands of years. Paleo-Indians have been documented in south Florida dating back to over 13,000 years ago. Archaeologists have uncovered ancient sites at Arch Creek and along the Oleta River. According to archaeologist Robert Carr, although the largest Tequesta settlement was located at the mouth of the Miami River, by 750 BCE approximately 100 Native Americans routinely inhabited the local area which was just a one-hour canoe trip north of the main settlement. The Oleta River, which cuts through Ojus, was one of the Tequesta's primary "roadways" for millennia. Subsequent people, to include Seminoles, European explorers, and early settlers, would also use the Oleta River to traverse from Miami to the New River in Ft. Lauderdale. During the late nineteenth century, settlers established farms along Oleta River. These settlers grew peas, beans, sugar cane, and tomatoes. Seminoles set up a trading post near present-day Greynolds Park to conduct business with the Ojus settlers. In 1897, Albert Fitch named the area Ojus after the Seminole word for "plenty" or "lots of." After the turn of the century, rock was discovered in the area that was ideal for road building. Many of the neighborhood lakes were created during the early part of the twentieth century to support construction of the area's infrastructure. Two landmarks were created in the early part of the twentieth century, but only one still survives today. In 1925, Carl Fischer constructed the Fulford-Miami Speedway in the present-day Sky Lake neighborhood. The wooden race track was then billed as the world's fastest. It was unfortunately destroyed by the devastating 1926 hurricane. One of the region's most notable features, Greynolds Park, was established in 1936 as part of President Franklin Roosevelt's Civilian Conservation Corps 'New Deal' programs. The park was named after Mr. A.O. Greynolds, owner of the Ojus Rock Company, who donated 110 acres of his property in exchange for naming the park after him. Over the years, the park has expanded to include a golf course, a boathouse, and has even hosted popular musical acts during the 1960s such as the Grateful Dead. Greynolds Park was declared a historic site in 1983.
