Fischer is an unincorporated community in Comal County, Texas, United States. The population was 688 at the 2010 census. The community is part of the San Antonio Metropolitan Statistical Area.
Although it is unincorporated, Fischer has a post office, with the ZIP code of 78623.
The climate in this area is characterized by hot, humid summers and generally mild to cool winters. According to the Köppen Climate Classification system, Fischer has a humid subtropical climate, abbreviated "Cfa" on climate maps.
Coordinates: 29°58′37″N 98°15′57″W / 29.97694°N 98.26583°W