Ceará (Brazilian Portuguese: [seaˈɾa] ^ⓘ, locally [sjaˈɾa] or [si.aˈɾa]) is one of the 26 states of Brazil, located in the northeastern part of the country, on the Atlantic coast. It is the eighth-largest Brazilian State by population and the 17th by area. It is also one of the main tourist destinations in Brazil. The state capital is the city of Fortaleza, the country's fourth most populous city. The state has 4.3% of the Brazilian population and produces 2.1% of the Brazilian GDP. It is divided into 184 municipalities.

Literally, the name Ceará means "sings the jandaia". According to José de Alencar, one of the most important writers of Brazil and an authority in Tupi Guaraní, Ceará means turquoise or green waters.^{[citation needed]}

The state is best known for its extensive coastline, with 600 kilometers (370 mi) of sand. There are also mountains and valleys producing tropical fruits. To the south, on the border of Paraíba, Pernambuco and Piauí, is the National Forest of Araripe.

Ceará has an area of 148,016 square kilometres (57,149 sq mi). It is bounded on the north by the Atlantic Ocean, on the east by the states of Rio Grande do Norte and Paraíba, on the south by Pernambuco state, and on the west by Piauí.

Ceará lies partly upon the northeast slope of the Brazilian Highlands, and partly upon the sandy coastal plain. Its surface is a succession of great terraces, facing north and northeast, formed by the denudation of the ancient sandstone plateau which once covered this part of the continent; the terraces are seamed by watercourses, and their valleys are broken by hills and ranges of highlands. The latter are the remains of the ancient plateau, capped with horizontal strata of sandstone, with a uniform altitude of 2,000 to 2,400 feet (610 to 730 m). The flat top of such a range is called a chapada or taboleira, and its width in places is from 32 to 56 miles (51 to 90 km). The boundary line with Piauí follows one of these ranges, the Serra de Ibiapaba, which unites with another range on the southern boundary of the state, known as the Serra do Araripe. Another range, or escarpment, crosses the state from east to west, but is broken into two principal divisions, each having several local names. These ranges are not continuous, the breaking down of the ancient plateau having been irregular and uneven.

The rivers of the state are small and, with one or two exceptions, become completely dry in the dry season. The largest is the Jaguaribe, which flows entirely across the state in a northeast direction.

Ceará has a varied environment, with mangroves, caatinga, jungle, scrubland and tropical forest. The higher ranges intercept considerable moisture from the prevailing trade winds, and their flanks and valleys are covered with a tropical forest which is typical of the region, gathering species from tropical forests, caatinga and cerrado. The less elevated areas of the plateaus are either thinly wooded or open campo. Most of the region at the lower altitudes is characterized by scrubby forests called caatingas, which is an endemic Brazilian vegetation. The sandy, coastal plain, with a width of 12 to 18 miles (19 to 29 km), is nearly bare of vegetation, although the coast has many enclaves of restingas (coastal forests) and mangroves.

The soil is, in general, thin and porous and does not retain moisture; consequently, the long dry season turns the country into a barren desert, relieved only by vegetation along the riverways and mountain ranges, and by the hardy, widely distributed carnauba palm (Copernicia cerifera), which in places forms groves of considerable extent. Some areas in the higher ranges of Serra da Ibiapaba, Serra do Araripe and others are more appropriate for agriculture, as their soil and vegetation are less affected by the dry seasons.