Cosumnes

Cosumnes may refer to
 * Cosumnes River in northern California, United States
 * Cosumnes River Preserve near Sacramento, California
 * Cosumnes River AVA, an American Viticultural Area in Sacramento County and San Joaquin County
 * Cosumnes River College in Sacramento, California
 * Cosumnes River College (Sacramento RT) a light rail station in Sacramento, California
 * Cosumnes Oaks High School in Elk Grove, California
 * Rancho Cosumnes in Sacramento County, California