Glenn is an unincorporated community in Glenn County, California. It lies at an elevation of 98 feet (30 m).. The town is located on the Sacramento River, at the intersection of State Route 45 and State Route 162. It is about ten miles (16 km) east of Interstate 5 and Willows on the U.S. Geological Survey 7.5-minute quadrangle, Glenn, California. The U.S. Geological Survey, National Geographic Names Database, calls its existence official with a feature ID of 1658621 and lists the NAD27 coordinates of the community as . The ZIP Code, shared with Ordbend and Bayliss, is 95943. The community is inside area code 530. This area is flagged as rural by the U.S. Census Bureau.
The area is relatively flat land along the banks of the Sacramento River. A local landmark is the Glenn Post Office on SR45 just north of SR162. Farther north still along SR45 is the local Mennonite Church as there is a modest population of Mennonite farmer families in this area. Another visually-disturbing landmark: as of 2004, a local resident within a half mile of SR45 along SR162 had large parts of an Antonov AN-2 fixed wing aircraft in their front yard. Much of the area is agricultural land under cultivation. West of town, there is a natural gas well field possibly operated by Denver-based Venoco, Inc. along SR162 between Glenn and Willows.
In the state legislature Glenn is located in the 4th Senate District, represented by Republican Sam Aanestad, and in the 2nd Assembly District, represented by Republican Doug LaMalfa. Federally, Glenn is located in California's 2nd congressional district, which has a Cook PVI of R +13 and is represented by Republican Wally Herger.