Sebring Regional Airport (IATA: SEF, ICAO: KSEF, FAA LID: SEF) is a public use airport located six nautical miles (7 mi, 11 km) southeast of the central business district of Sebring, a city in Highlands County, Florida, United States.
 It is owned by the Sebring Airport Authority.
 This airport is included in the National Plan of Integrated Airport Systems for 2011–2015, which categorized it as a "general aviation" facility.
Avon Park is a city in Highlands County, Florida, United States.
 As of the 2010 census the population was 8,836, and in 2015 the estimated population was 10,086.
 It is the oldest city in Highlands County, and was named after Stratford-upon-Avon, England.
The Sebring Downtown Historic District is a U.S. historic district (designated as such on March 16, 1990) located in Sebring, Florida.
 The district is at Circle Drive and Ridgewood Drive from Mango Street to Magnolia Avenue.
 It contains 22 historic buildings.
The Jerseyville Downtown Historic District is a 17.5 acre historic district encompassing the commercial center of Jerseyville, Illinois.
 The district includes most of the city's historic commercial buildings, which were built along State Street (U.S. Route 67) and its cross streets from 1867 to 1929.
 The center of the district is at the intersection of State and Pearl Streets.
 The most prominent building in the district is the Jersey County Courthouse, a 124-foot (37.8 meter) tall limestone Romanesque Revival building built in 1893; unlike many other Illinois county seats, however, the district is not centered on the courthouse.
 The other buildings in the district are mainly one- and two-story brick Commercial style structures; other architectural influences in the district include Romanesque, Greek Revival, and Chateauesque.
 Other non-commercial buildings in the district include the Jerseyville Public Library, a Georgian style Carnegie library built in 1904, and the First Baptist Church, a Classical Revival church built in 1916.
The Florida Heartland is a region of Florida located to the north and west of Lake Okeechobee, composed of six inland, non-metropolitan counties — DeSoto, Glades, Hardee, Hendry, Highlands, and Okeechobee.
 In 2000, The US Census Bureau recorded the population of the region at 229,509.
 In 2010, The US Census Bureau recorded the population of the region at 253,399, a growth rate of 11.0%.
 The most populous county in the region is Highlands County, and the region's largest city is Sebring.
 Unlike the coastal areas to the east and west, the rural nature of the Florida Heartland is culturally closer to the Deep South than the rest of peninsular Florida and has traditionally been inhabited by Americans of predominately English ancestry.
 While located in Palm Beach County, the nearby rural cities of Belle Glade and Pahokee, located on the southeastern shore of Lake Okeechobee, are more associated with the Florida Heartland than South Florida.
Calumet ( ) is a village in Calumet Township, Houghton County, in the U.S. state of Michigan's Upper Peninsula, that was once at the center of the mining industry of the Upper Peninsula.
 Also known as Red Jacket, the village includes the Calumet Downtown Historic District, listed on the National Register of Historic Places (NRHP).
 The village may itself be included within the Calumet Historic District, a larger area which is NRHP-listed and which is a National Historic Landmark District.
 It is bordered on the north by Calumet Township, on the south by the unincorporated town of New Town and Blue Jacket, on the east by Blue Jacket and Calumet Township, and on the west by Yellow Jacket and Calumet Township.
 The population was 726 at the 2010 census.
 Calumet's nickname is Copper Town U.S.A.
Sebring ( ) is a city in Highlands County, Florida, United States, nicknamed "The City on the Circle", in reference to Circle Drive, the center of the Sebring Downtown Historic District.
 As of the 2010 census the population was 10,491.
 It is the county seat of Highlands County, and is the principal city of the Sebring Metropolitan Statistical Area.
Highlands County is a county located in the U.S. state of Florida.
 As of the 2010 census, the population was 98,786.
 Its county seat is Sebring.
The Walton County Heritage Museum is located at 1140 Circle Drive, DeFuniak Springs, Florida.
 Housed in the former L&N railroad depot, it is part of the DeFuniak Springs Historic District, which is listed on the National Register of Historic Places.
Gloucester Downtown Historic District is a national historic district located at Gloucester Courthouse, Gloucester County, Virginia.
 The district encompasses 57 contributing buildings and 5 contributing sites.
 It includes the central business district and limited residential development directly connected to the historic court circle (the Gloucester County Courthouse Square Historic District) and Main Street extending east to Edge Hill, to include the Gloucester Women's Club.

Question: What city in Highlands County, Florida is nicknamed "The City on the Circle", in reference to Circle Drive, the center of the Sebring Downtown Historic District, has less than 11% of the county's 2010 census population?
Answer: Sebring