Question: The Hollywood Casino Gulf Coast in located in what Mississippi county?

Context paragraphs:
Gulf Coast Native sheep: The Gulf Coast Native is a breed of sheep native to the U.S. states bordering the Gulf Coast.  Also occasionally known as the "Louisiana Scrub", "Pineywoods Native" or simply "Gulf Coast sheep", the breed is a mix of many of the sheep varieties which populated the Southern United States during the European colonization of the region.  It is now an exceedingly rare breed, but one valuable for its ability to adapt to the hot humid climate of the Gulf Coast.

NWA Gulf Coast Tag Team Championship: The NWA Gulf Coast Tag Team Championship was the main tag team championship in Gulf Coast Championship Wrestling or NWA Gulf Coast.  The Gulf Coast tag team championship is the successor for GCCW's version of the NWA Southern Tag Team Championship that was promoted in the Tennessee, Alabama, Florida and Mississippi region from 1955 until 1967 where it was replaced by the "NWA Gulf Coast Tag Team Championship.  The Gulf Coast Tag Team championship was promoted from 1967 until 1978 where Southeast Championship Wrestling took control of the title renaming in back to the "NWA Southern Tag Team Championship" and promoted it in its "Southern Division" in 1978 and 1979.  In 1980 the Southern Division was abandoned and the Northern Division of the NWA Southern Tag Team Championship became the main title of SECW.

Rivercrest School District: Rivercrest School District, formerly Southern Mississippi County School District, is a public school district based in Rivercrest High School in unincorporated Mississippi County, Arkansas, United States, in proximity to Marie and with a Wilson postal address.  The school district provides early childhood, elementary and secondary education for more than 1,300 prekindergarten through grade 12 students and employs more than 220 staff (including faculty) at its two facilities.  The district encompasses 363.77 mi2 of land in Mississippi County.

Bay St. Louis, Mississippi: Bay Saint Louis is a city in and the county seat of Hancock County, Mississippi, in the United States.  It is part of the Gulfport–Biloxi Metropolitan Statistical Area.  As of the 2010 census, the city had a total population of 9,260.  The city is recovering population lost in 2005 due to Hurricane Katrina, and the Census Bureau's 2016 population estimate was 12,667.

Mississippi County Airport: Mississippi County Airport (ICAO: KCHQ, FAA LID: CHQ) is a public use airport in Mississippi County, Missouri, United States.  It is owned by the Mississippi County Commission and located four nautical miles (5 mi, 7 km) south of the central business district of Charleston, Missouri.

Mary Mills Mississippi Gulf Coast Invitational: The Mary Mills Mississippi Gulf Coast Invitational was a golf tournament on the LPGA Tour from 1963 to 1964.  It was played on the Mississippi Gulf Coast at the Gulf Hills Dude Ranch & Country Club in Ocean Springs, Mississippi in 1963 and at the Broadwater Beach Hotel & Golf Club in Biloxi, Mississippi in 1964.  Mississippi native, Mary Mills, served as tournament host.

Hollywood Casino Gulf Coast: Hollywood Casino Gulf Coast is a hotel-casino complex located in Bay St. Louis, Mississippi, owned by Gaming and Leisure Properties and operated by Penn National Gaming.

Mississippi County, Arkansas: Mississippi County is a county located in the U.S. state of Arkansas.  As of the 2010 census, the population was 46,480.  There are two county seats, Blytheville and Osceola.  The county was formed on November 1, 1833, and named for the Mississippi River which borders the county to the east.  Mississippi County is part of the First Congressional District in Arkansas.  The Mississippi County Judge is Randy Carney.

Buffalo Island: Buffalo Island is a local name given to western Mississippi County and eastern Craighead County, Arkansas.  It consists of the land south of Big Lake between the Little River (not to be confused with a stream of the same name in southwestern Arkansas) and the St. Francis River, containing the communities of Manila (Mississippi County), Monette (Craighead County), Leachville (Mississippi County), Black Oak (Craighead County), and Caraway (Craighead County)."

Mississippi Gulf Coast: The Mississippi Gulf Coast, also known as the Mississippi Gulf Coast region, or simply The Coast, is the area of southern Mississippi along the Gulf of Mexico region.

Supporting paragraphs: Hollywood Casino Gulf Coast Bay St. Louis, Mississippi
Answer: Hancock County