Mather (/ˈmeɪ.θər/ MAY-ther) is a census-designated place in Sacramento County, California.

[2] The 2010 United States census reported Mather's population was 4,451.

It is the site of the former Mather Air Force Base, closed by the federal government in 1993.

According to the United States Census Bureau, the CDP covers an area of 10.0 square miles (26.0 km2), 99.75% of it land and 0.25% of it water.

The climate of Mather is Mediterranean, characterized by hot, dry summers, at times exceeding 100 °F or 37.8 °C, and mild, rainy winters, with lows at night falling below freezing at times.