Lemon Township is one of thirteen townships in Butler County, Ohio, United States. Located in the northeastern part of the county, it includes most of the city of Monroe. It had a population of 13,875 at the 2010 census. It is the only Lemon Township statewide. History The township as originally created was approximately and included all of the Butler County portions of what is Middletown and most of the Butler County part of Monroe, the remainder being in Liberty Township. The southern part of the township was within the limits of the Symmes Purchase, the northern boundary today being marked by Todhunter Road, north of the southern boundary. It was bounded on the east by the Warren County line and on the west and north by the Great Miami River. Lemon Township was erected by the Butler County Court of Quarter Sessions on May 10, 1803, with these boundaries: Beginning on the west bank of the Great Miami, at the southwest corner of fractional township No. 1 in the fourth range west of the Miami; thence north to the northern boundary of the county; thence east with the northern boundary line of the county to the northeast corner thereof; thence southwestwardly and south with the eastern boundary of the county to the southeast corner of section No. 11, township 3, in the third entire range; thence west to the Miami; thence southwestwardly down the Miami to the beginning. The original boundaries included all of what is now Madison Township, Madison being divided from Lemon on May 7, 1810. Historic population figures 1900—1,743 1910—1,534 1920—1,583 1930—1,988 1940—2,109 1950—2,545 1960—6,236 1970—12,795 1980—13,553 1990—6,056 2000—8,607 2010—13,875 Geography Located in the eastern part of the county, it borders the following townships and city: Middletown - north Turtlecreek Township, Warren County - east Liberty Township - south Madison Township - west The Miami and Erie Canal passed through the township, parallelling the eastern shore of the Great Miami and linking Hamilton to Middletown. Remains of the canal, including the lock at Excello, are preserved as parks in the township. The Norfolk Southern Railway has a main line through the center of the township. Major roads include Interstate 75 (crossing the southeast corner of the township) and State Routes 4, 63, and 73. The old Dixie Highway, later U.S. Route 25, passed through the township and is now an unnumbered road sharing the name of