Marathon is a city

City

A city is a relatively large and permanent settlement. Although there is no agreement on how a city is distinguished from a town within general English language meanings, many cities have a particular administrative, legal, or historical status based on local law.For example, in the U.S...

 on Knight's Key

Knight's Key

Knight's Key is an island in the middle Florida Keys, located entirely within the borders of the city of Marathon, Florida.-Geography:U.S. 1 crosses the key at approximately mile marker 47, at the western end of Key Vaca and eastern end of the Seven Mile Bridge.-History:Prior to the completion of...

, Boot Key

Boot Key

Boot Key is an island in the middle Florida Keys located adjacent to Key Vaca. Boot Key is within the city limits of Marathon, Florida, USA. The island is largely undeveloped despite having a bridge spanning Boot Key Harbor to Key Vaca, which is now closed to pedestrian and vehicular...

, Key Vaca

Key Vaca

Key Vaca is an island in the middle Florida Keys, located entirely within the borders of the city of Marathon, Florida. It is often incorrectly identified as "Marathon Key."- Geography :Key Vaca is located between Fat Deer Key and Knight's Key...

, Fat Deer Key

Fat Deer Key

Fat Deer Key is an island in the middle Florida Keys.U.S. 1 crosses the key at approximately mile markers 53.5-56, between Long Point Key and Key Vaca....

, Long Point Key

Long Point Key

Long Point Key is an island in the middle Florida Keys.U.S. 1 traverses the key between Crawl Key and Fat Deer Key, which is part of a long stretch of road known as the Grassy Key Causeway....

, Crawl Key

Crawl Key

Crawl Key is an island in the middle Florida Keys.U.S. 1 traverses the key between Grassy Key and Long Point Key, which is part of a long stretch of road known as the Grassy Key Causeway....

 and Grassy Key

Grassy Key

Grassy Key, Florida is an island in the middle Florida Keys.It is located on U.S. 1 , at approximately mile markers 57—60, below the Conch Keys. It has an area of 3.65 km², with a population of 974 as of the census 2000....

 island

Island

An island or isle is any piece of sub-continental land that is surrounded by water. Very small islands such as emergent land features on atolls can be called islets, cays or keys. An island in a river or lake may be called an eyot , or holm...

s in the middle Florida Keys

Florida Keys

The Florida Keys are a coral archipelago in southeast United States. They begin at the southeastern tip of the Florida peninsula, about south of Miami, and extend in a gentle arc south-southwest and then westward to Key West, the westernmost of the inhabited islands, and on to the uninhabited Dry...

, in Monroe County

Monroe County, Florida

Monroe County is a county located in the state of Florida. As of 2000, the population was 79,589. The U.S. Census Bureau 2006 estimate for the county was 74,737....

, Florida

Florida

Florida is a state in the southeastern United States, located on the nation's Atlantic and Gulf coasts. It is bordered to the west by the Gulf of Mexico, to the north by Alabama and Georgia and to the east by the Atlantic Ocean. With a population of 18,801,310 as measured by the 2010 census, it...

, in the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

. As of the 2000 census

Census

A census is the procedure of systematically acquiring and recording information about the members of a given population. It is a regularly occurring and official count of a particular population. The term is used mostly in connection with national population and housing censuses; other common...

, the city had a total population

Population

A population is all the organisms that both belong to the same group or species and live in the same geographical area. The area that is used to define a sexual population is such that inter-breeding is possible between any pair within the area and more probable than cross-breeding with individuals...

 of 10,255. As of 2005, the population estimated by the U.S. Census Bureau is 10,626.
Marathon is located at 24.726310°N 81.040327°W.

According to the United States Census Bureau

United States Census Bureau

The United States Census Bureau is the government agency that is responsible for the United States Census. It also gathers other national demographic and economic data...

, the city has a total area of 9.6 square miles (24.9 km²), of which 8.6 square miles (22.3 km²) is land and 1 square miles (2.6 km²) (10.37%) is water.