The exact coordinates for the City of Moore Haven is located at 26°50′N 81°6′W / 26.833°N 81.100°W .

According to the United States Census Bureau, the city has a total area of 1.1 square miles (2.8 km ), of which 1.1 square miles (2.8 km ) is land and 0.1 square miles (0.26 km ) (6.09%) is water.
Moore Haven has a humid subtropical climate (Köppen Cfa) with some characteristics of a tropical monsoon climate (Am), with a defined rainy season from June through September.

As of the 2020 United States census, there were 1,566 people, 793 households, and 422 families residing in the city.

As of the 2010 United States census, there were 1,680 people, 744 households, and 467 families residing in the city.
As of the census of 2000, there were 1,635 people, 572 households, and 414 families residing in the city. The population density was 1,508.8 inhabitants per square mile (582.6/km ). There were 792 housing units at an average density of 730.9 per square mile (282.2/km ). The racial makeup of the city was 61.28% White, 22.32% African American, 0.80% Native American, 0.43% Asian, 14.56% from other races, and 0.61% from two or more races. Hispanic or Latino of any race were 28.01% of the population.

In 2000, there were 572 households, out of which 35.0% had children under the age of 18 living with them, 48.8% were married couples living together, 14.5% had a female householder with no husband present, and 27.6% were non-families. 22.0% of all households were made up of individuals, and 10.1% had someone living alone who was 65 years of age or older. The average household size was 2.81 and the average family size was 3.23.

In 2000, in the city, the population was spread out, with 31.8% under the age of 18, 8.1% from 18 to 24, 25.5% from 25 to 44, 19.8% from 45 to 64, and 14.8% who were 65 years of age or older. The median age was 33 years. For every 100 females, there were 107.8 males. For every 100 females age 18 and over, there were 109.2 males.

In 2000, the median income for a household in the city was $26,801, and the median income for a family was $28,542. Males had a median income of $26,615 versus $20,250 for females. The per capita income for the city was $12,183. About 19.0% of families and 23.8% of the population were below the poverty line, including 30.0% of those under age 18 and 16.8% of those age 65 or over.

The Moore Haven Downtown Historic District is a U.S. historic district, designated as such in 1995. The district contains seven historic buildings, and has a park which houses the only Cypress tree in the district.