Bonita Springs is a city in Lee County, Florida, United States. The population was 53,644 at the 2020 census. It is part of the Cape Coral-Fort Myers, Florida Metropolitan Statistical Area, on the state's southwest coast.

According to the United States Census Bureau, the city has a total area of 41.0 square miles (106 km2), of which 35.3 square miles (91 km2) is land and 5.7 square miles (15 km2) (13.95%) is water.

The city is located on both Estero Bay and the Gulf of Mexico. The area referred to as Bonita Beach is located on a road-accessible barrier island (Little Hickory Island) that lies between the Gulf of Mexico and Estero Bay. The Imperial River flows through the downtown district of the city and empties out into Estero Bay.

The city lies in the tropical climate zone, having a mean January temperature of 65 Â°F (18 Â°C). Hurricane Charley made landfall north of Bonita Springs on August 13, 2004. Hurricane Wilma made landfall south of Bonita Springs on October 24, 2005. On September 9–10, 2017, Hurricane Irma, at the time a slow-moving Category 3 storm, passed over the southwest coast of Florida. The eyewall/eye passed overhead in Bonita Springs. Many structures were damaged or destroyed and the city experienced significant flooding.

As of the 2020 United States census, there were 53,644 people, 24,377 households, and 16,267 families residing in the city.

As of the 2010 United States census, there were 43,914 people, 19,137 households, and 12,917 families residing in the city.

The 2009 estimated median income for a household in the city was $53,452, and the median income for a family was $53,436. Males had a median income of $31,227 versus $25,358 for females. The per capita income for the city was $37,958. About 6.2% of families and 10% of the population were below the poverty line, including 20.2% of those under age 18 and 5.2% of those aged 65 or over.

In 2009, 16.7% of households had children under the age of 18 living with them, 61.2% were married couples living together, 4.1% had a female householder with no husband present, and 32.5% were non-families. 27.1% of all households were made up of individuals, and 11.6% had someone living alone who was 65 years of age or older. The average household size was 2.15 and the average family size was 2.55.

As of 2000, the population density was 929.4 inhabitants per square mile (358.8/km2). There were 31,716 housing units at an average density of 661.1 per square mile (255.3/km2).

In 2000, the city the population was spread out, with 13.9% under the age of 18, 5.9% from 18 to 24, 19.8% from 25 to 44, 28.8% from 45 to 64, and 31.7% who were 65 years of age or older. The median age was 54 years. For every 100 females, there were 104.6 males. For every 100 females aged 18 and over, there were 103.9 males.

Bonita Springs is served by the Lee County School District.

Fixed-route bus and trolley service is provided by the Lee County Transit Department, operated as LeeTran.

Seminole Gulf Railway owns and operates a line that passes through the city. The company offers freight service and local, daytime excursions.

Bonita Springs is served by local editions of the Fort Myers News-Press and Naples Daily News.

The metropolitan area is home to 36 radio stations. With an Arbitron-assigned 879,600 listening area population, the metropolitan area of which Bonita Springs is one part ranks 61/274 for the fall of 2013. Arbitron Standard Radio Market: Ft. Myers-Naples-Marco Island.

Nielsen Media Research designated market area: Ft. Myers-Naples.