Sheridan Township is a civil township of Clare County in the U. S. state of Michigan. The population was 1,575 at the 2010 census. Colonville is a historical settlement in the township at 43°50′39″N 84°42′21″W. Storekeeper Curtis Palmer was the first postmaster of a rural post office here, which operated from December 4, 1894, until January 15, 1904; the city of Beaverton is to the east in Gladwin County, the Beaverton ZIP code 48612 serves the northeast corner of Sheridan Township. The city of Clare is to the southwest, the Clare ZIP code 48617 serves most of Sheridan Township. Sheridan Township occupies the southeastern corner of Clare County and is bordered to the east by Gladwin County and to the south by Isabella County. According to the United States Census Bureau, the township has a total area of 36.5 square miles, of which 36.1 square miles is land and 0.35 square miles, or 0.95%, is water. The South Branch of the Tobacco River flows from west to east across the southern part of the township.

As of the census of 2000, there were 1,588 people, 482 households, 382 families residing in the township. The population density was 43.7 per square mile. There were 569 housing units at an average density of 15.7 per square mile. The racial makeup of the township was 97.61% White, 0.57% African American, 0.76% Native American, 0.06% Asian, 0.06% from other races, 0.94% from two or more races. Hispanic or Latino of any race were 0.88% of the population. There were 482 households out of which 45.2% had children under the age of 18 living with them, 66.0% were married couples living together, 8.7% had a female householder with no husband present, 20.7% were non-families. 16.8% of all households were made up of individuals and 6.8% had someone living alone, 65 years of age or older. The average household size was 3.28 and the average family size was 3.72. In the township the population was spread out with 37.0% under the age of 18, 9.3% from 18 to 24, 28.4% from 25 to 44, 17.5% from 45 to 64, 7.8% who were 65 years of age or older.

The median age was 29 years. For every 100 females, there were 94.6 males. For every 100 females age 18 and over, there were 95.3 males. The median income for a household in the township was $32,069, the median income for a family was $34,107. Males had a median income of $28,300 versus $22,841 for females; the per capita income for the township was $12,163. About 17.9% of families and 22.2% of the population were below the poverty line, including 31.7% of those under age 18 and 24.6% of those age 65 or over

Area code 760 is a California telephone area code, split from area code 619 on March 22, 1997. Area code 442 is an overlay of 760 that became effective on November 21, 2009, it encompasses much of the southernmost portions of California. The area includes Imperial and Mono counties, as well as portions of San Diego, San Bernardino, Los Angeles and Kern counties. Area code 760 was split from 619 in 1997, which in turn had been split from area code 714 in 1982. Within a decade of its creation, the proliferation of cell phones and pagers left 760 strained to the point that a new area code was needed for the area; the initial plan was a further area code split, with the San Diego and Imperial portions moving to a new 442 area code. However, this met with protests from businesses who did not want to change their numbers for the second time in a decade; the California Public Utilities Commission decided that 442 would be added as an overlay to 760 instead, since 2009 all users in the region have been required to include the area code when dialing local calls.

At 46,666 square miles, it is the largest area code in California with 29% of the state served by area codes 760 and 442. Areas within this area code which had manual service in the past include: Death Valley Junction Kelso Stovepipe Wells, Death Valley Rate centers located in area code 760: List of California area codes List of NANP area codes North American Numbering Plan Report on the 760 Area Code by the California Public Utilities Commission, Telecommunications Division NANPA area code map of California