Schuylkill County Airport (ICAO: KZER, FAA LID: ZER) , also known as Schuylkill County Joe Zerbey Airport, is a public use airport located eight nautical miles (9 mi, 15 km) west of the central business district of Pottsville, a city in Schuylkill County, Pennsylvania, United States.
 It is owned by the Schuylkill County 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.
Crawford County Airport (ICAO: KRSV, FAA LID: RSV) is a public use airport located four nautical miles (5 mi, 7 km) east of the central business district of Robinson, a city in Crawford County, Illinois, United States.
 It is owned by the Crawford County Airport Authority and was formerly known as Robinson Municipal Airport.
 This airport is included in the National Plan of Integrated Airport Systems for 2011–2015, which categorized it as a "general aviation" facility.
St. Mary's Airport (IATA: KSM, ICAO: PASM, FAA LID: KSM) is a public airport located four miles (6 km) west of the central business district of St. Mary's, in the Kusilvak Census Area of the U.S. state of Alaska.
 This airport is publicly owned by the State of Alaska Department of Transportation and Public Facilities (DOT&PF) - Northern Region.
Modesto City–County Airport (IATA: MOD, ICAO: KMOD, FAA LID: MOD) (Harry Sham Field) is two miles (3 km) southeast of Modesto in Stanislaus County, California, USA.
St. Clair County Airport (IATA: PLR, ICAO: KPLR, FAA LID: PLR) is a public use airport located three nautical miles (6 km) southeast of the central business district of Pell City, in St. Clair County, Alabama, United States.
 It is owned by the St. Clair County Airport Authority.
 According to the FAA's National Plan of Integrated Airport Systems for 2009–2013, it is categorized as a "reliever airport" for the Birmingham-Shuttlesworth International Airport.
St. Mary's County Regional Airport (IATA: LTW, FAA LID: 2W6) , also known as Captain Walter Francis Duke Regional Airport, is a public airport located in St. Mary's County, Maryland, four miles (six km) northeast of the central business district of Leonardtown.
 The airport is also located 8 nmi west of Naval Air Station Patuxent River.
 It is owned and operated by the St. Mary's County Board of County Commissioners.
Henry County Airport (FAA LID: KHMP) , is a public-use county airport located three nautical miles (6 km) west of the central business district of Hampton, a city in Henry County, Georgia, United States.
 It was known as Clayton County Airport – Tara Field, which was the name still used by the Federal Aviation Administration (FAA) and the Georgia Department of Transportation (GDOT) until approval of the Atlanta South Regional Airport name.
 The airport was renamed Atlanta South Regional Airport, which was approved by the airport board of commissioners in December 2011, and was approved by the GDOT and the FAA before it went into effect.
Greater Portsmouth Regional Airport (IATA: PMH, ICAO: KPMH, FAA LID: PMH) , also known as Scioto County Airport, is a public use airport located on State Route 335 in the community of Minford, Ohio, 10 nautical miles (12 mi, 19 km) northeast of the central business district of Portsmouth, a city in Scioto County, Ohio, United States.
 It is owned by the Scioto County 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.
Clinton–Sampson County Airport (IATA: CTZ, ICAO: KCTZ, FAA LID: CTZ) is a public use airport located two nautical miles (4 km) southwest of the central business district of Clinton, a city in Sampson County, North Carolina, United States.
 It is owned by the city and county.
 This airport is included in the National Plan of Integrated Airport Systems for 2011–2015, which categorized it as a "general aviation" facility.
 It was formerly known as Sampson County Airport.
Modesto City School District is a public school district based in Stanislaus County, California, United States, with an enrollment of approximately 32,000 students.
 Founded in 1871, the district consists of an elementary district and a high school district with a common administration.
 Seven other school districts feed into Modesto City Schools at the high school level.

Question: Are both Modesto City–County Airport and St. Mary's Airport located in the United States?
Answer: yes