Despite its small size, Maryland exhibits considerable climatic diversity. Temperatures vary from an annual average of 9 C in the extreme western uplands to 15 C in the southeast, where the climate is moderated by the Chesapeake Bay and the Atlantic Ocean. The daily mean temperature for Baltimore is 13 C, ranging from 1 C in January to 25 C in July.

In 2000, 4, 322, 329 residents, or 87.% of the population five years old or older (down from 91.1% in 1990), spoke only English at home.

The United States dollar, denoted by USD or the symbol $, is the official currency used in the United States. Commonly referred to as the "American dollar, " the currency is divided into 100 cents (symbol )

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In 2000, Maryland's population was 5, 296, 486, according to the federal census conducted every 10 years by the U.S. Census Bureau. Maryland ranks 19th in population. With 529.1 persons per square land mile in 1999, it ranked 6th in population density among states (including the District of Columbia).

Annapolis is the capital of the U.S. state of Maryland, as well as the county seat of Anne Arundel County.