Question: What is the largest town in the county where Leftwich is located?

Context paragraphs:
Pittsburg, New Hampshire: Pittsburg is a town in Coos County, New Hampshire, United States.  The population was 869 at the 2010 census.  It is the northernmost town in New Hampshire and the largest town by area in the state – and in New England as well – more than twice the size of the next largest town, Lincoln.  U.S. Route 3 is the only major highway in the town, although the northern terminus of New Hampshire Route 145 also lies within Pittsburg.

Millport, Alabama: Millport is a town in Lamar County, Alabama, United States.  It incorporated in 1887.  At the 2010 census the population was 1,049, down from 1,160 in 2000.  After its incorporation from 1890-1900, it was the largest town in Lamar County, losing the distinction to Sulligent.  Since 1940, it has been the 3rd largest town.

Mandal (town): Mandal is the administrative centre of Mandal municipality in Vest-Agder county, Norway.  It is the second largest town by population in Vest-Agder county after Kristiansand and the fourth largest town in the Sørlandet/Agder region.  The town is located at the mouth of the river Mandalselva at the southern end of the Mandalen valley.  The 6.32 km2 town has a population (2015) of 10,725 which gives the town a population density of 1697 PD/km2 .

South Kingstown, Rhode Island: South Kingstown is a town in Washington County, Rhode Island, United States.  The population was 30,639 at the 2010 census.  South Kingstown is the largest town in Washington County and is the largest town (land and water area) in the state of Rhode Island.

Leftwich: Leftwich is a village in Cheshire, England.  It has been absorbed into the town of Northwich, and is situated within the unitary authority of Cheshire West and Chester.  The name, given as merely 'Wice' in the Domesday Book, is written 'Leftetewych' in a document of 1278 and derives from 'Leoftæt's wic' (Leoftæt being a woman's name).

Cardigan, Ceredigion: Cardigan (Welsh: "Aberteifi" , ] ) is a town in the county of Ceredigionformerly Cardiganshirein Wales.  The town lies on a tidal reach of the River Teifi at the point where Ceredigion meets Pembrokeshire.  It was the county town of the historic county of Cardiganshire and is the second largest town in present-day Ceredigion.  The largest town, Aberystwyth, is now one of the two administrative centres; the other being Aberaeron.

Banzhuang: Banzhuang ()is the largest town of Ganyu County in the north of Jiangsu Province of PRC, adjacent to Linyi of Shandong Province.  After combinated with Huandun Town, Banzhuang Town has a total area of 175.61 square kilometers, and so is the largest town in area in Ganyu County.  It is also has a population of about 100,000.

Oberursel (Taunus): Oberursel (Taunus) is a town in Germany and part of the Frankfurt Rhein-Main urban area.  It is located to the north west of Frankfurt, and is the second largest town in the county of Hochtaunuskreis and the 14th largest town in Hesse.  In 2011, the town hosted the 51st Hessentag state festival.

Tralee: Tralee ( ; Irish: "Trá Lí (formerly Tráigh Lí)" , meaning "strand of the Lee (river)" ) is the county town of County Kerry in the south-west of Ireland.  The town is on the northern side of the neck of the Dingle Peninsula, and is the largest town in County Kerry.  The town's population including suburbs was 23,691 as of the 2016 census making it the 8th largest town, and 14th largest urban settlement in Ireland.  Tralee is well known for the Rose of Tralee International Festival which has been held annually in August since 1959.

Cheshire: Cheshire ( or ; archaically the County Palatine of Chester) is a county in North West England, bordering Merseyside and Greater Manchester to the north, Derbyshire to the east, Staffordshire and Shropshire to the south and Wales to the west.  Cheshire's county town is Chester; the largest town is Warrington.

Supporting paragraphs: Leftwich Cheshire
Answer: Warrington