Question: Columbus, Ohio is located in which county?
Context: South High School is a public high school located on the south side of Columbus, Ohio.  It was opened in 1900 as the fourth Columbus City Schools high school at 345 Deshler Avenue in Columbus, Ohio.  The current building was opened March 31, 1924.  The Charles S. Barrett Building 345 E. Deshler Ave (named for that building's first Principal in 1924 when it was reuitlized as a junior high school) opened September 1900.  Prior to that in 1895-1897 South High School utilized part of the Ohio Avenue Elementary School.  In 1897 it was decided that the building was too far east for its name; the south side students were returned to the Columbus High School building at 6th & Broad Streets (which later became the 1st Central High School), and the building process began on the Deshler Street Building.  It was known as South Urban Academy for a short time.  The school is located at 1160 Ann Street. The Discovery District is a district located in downtown Columbus, Ohio.  The Discovery District is a SID (special improvement district) and contains Columbus's creative campus.  This is home to Columbus State Community College, Columbus College of Art and Design, Columbus Museum of Art, and Columbus Metropolitan Library.  It is considered a cultural district because of its close proximity to higher educational campuses and art destinations.  It was named to imply that the area is full of possibility due to the number of learning and creative campuses in this small area.  "Culture, art, and academia converge and present the Discovery District."  While not typically viewed as the most prominent Columbus neighborhood, the density of academic and arts-based institutions in this area are what make this creative campus unique. Old North Columbus is a neighborhood located just north of the Ohio State University in Columbus, Ohio.  It was founded in 1847 where, at the time, it was a stand-alone city out of the confines of Columbus until it was incorporated into the City of Columbus in 1871.  In its early years the city was a popular stagecoach stop with people traveling from Worthington to Columbus.  Today Old North Columbus is popular for its local music and its unique "untouched architecture" which is reminiscent of its old roots. Griggs Dam is located within the Columbus, Ohio city limits, on the Scioto River near Upper Arlington, Ohio, in Franklin County.  The dam forms Griggs Reservoir, which is a major source of drinking water for the city of Columbus.  Named after the city's chief engineer, Julian Griggs, the dam was completed in 1905 at a cost of $700,000 and was the first major reservoir in the Columbus area.  For twenty years, it served as the only reservoir serving the city of Columbus' drinking water needs.  Griggs Dam is a gravity dam with a 500 ft curved concrete spillway.  Its height is only 35 ft , but it forms a reservoir almost 6 mi long with a 1200000000 usgal capacity.  US Route 33 runs along the East side of the dam, providing access to the dam and recreation area on both the upstream and downstream sides of the dam. The 166th Air Refueling Squadron (166 ARS) is a unit of the Ohio Air National Guard 121st Air Refueling Wing located at Rickenbacker Air National Guard Base, Columbus, Ohio.  The 166th is equipped with the KC-135R Stratotanker. Robert Ross Shaw, Jr. was a prominent lawyer in Columbus, Ohio, and a member of the Ohio Senate from 1967 to 1972.  He served the 16th Senate District, which encompasses most of the western portion of Franklin County, Ohio.  Senator Shaw was born on December 5, 1904, the first son of Robert Ross Shaw, Sr. and Euphemia Duncan "Effie" Harrington.  He graduated from The Ohio State University Moritz College of Law in 1929.  Upon opening his private legal practice, he married Elsie Melvilla Murray, also of Columbus, in St. Mary's, West Virginia on September 28, 1931.  Among his duties during his tenure in the legislature, he was Chairman of the Senate Finance Committee.  In 1972, Senator Shaw was instrumental in the introduction and passage of Senate Bill SB 176, which provided for the licensing and regulation of professional psychologists within the State of Ohio.  He retired from the Senate later that year, following the death of his wife, Elsie, and was succeeded by Donald L. Woodland.  During his subsequent retirement, he married his childhood sweetheart, Mabel Damsel, in Columbus on May 16, 1980.  Senator Shaw died in Columbus on March 27, 1985, and was buried in Union Cemetery. The Ohio State University at Mansfield is a regional campus of The Ohio State University located in Mansfield, Ohio.  It was founded in 1958 as a land-grant college.  Its 644 acre campus is situated in the western foothills of the Allegheny Plateau, the North Central Ohio region, with easy access to Columbus and Cleveland.  The campus offers seven bachelor degree programs and two master degree programs.  Students can start at Mansfield and finish their degrees at The Ohio State University, Columbus, with one or more of Ohio State’s 170 majors.  The Bromfield Library of the OSU mansfield campus provides access to all the resources of The Ohio State University and Ohio Link. Rickenbacker Air National Guard Base (1942–present) is an Air National Guard facility of the Ohio Air National Guard located near Lockbourne in southern Franklin County.  The base was named for the famous early aviator and Columbus native Eddie Rickenbacker.  It is the home of the United States Air Force's 121st Air Refueling Wing (121 ARW), which serves as the host wing and is an Air National Guard (ANG) unit operationally-gained by the Air Mobility Command (AMC). The Taft Coliseum is a 5,003-permanent seat multi-purpose arena located at the Ohio Expo Center and State Fairground in Columbus, Ohio.  It opened in 1918.  Nicknamed "The Barn," the Coliseum has become a legendary and traditional High School Basketball venue.  It continues to be home to the OHSAA central district and regional playoffs in boys' High School hoops.  During each fall and winter the Coliseum is also home to CAHA youth hockey.  It was also once home to the Ohio State University men's basketball team, Columbus Horizon CBA basketball team, Columbus Thunderbolts Arena Football League team, and the Columbus Stars and Columbus Chill ice hockey teams.  The Barn was renovated in 2005 to include new scoreboards, the addition of shot clocks above the backboards, a fresh coat of paint, and new rest rooms. Mansfield is a city in and the county seat of Richland County, Ohio, United States.  Located midway between Columbus and Cleveland via Interstate 71, it is part of Northeast Ohio and North-central Ohio regions in the western foothills of the Allegheny Plateau, approximately 65 mi northeast of Columbus, 65 mi southwest of Cleveland and 91 mi southeast of Toledo.  Richland County is part of the 18-county Northeast Ohio region.
Answer: Franklin County