ZORN, TEXAS. Zorn is on State Highway 123 thirteen miles north of Seguin in northern Guadalupe County. It was named for Joseph Zorn, who had a store there in the 1850s. A post office opened in 1891. By 1896 Zorn had two gristmills, a general store, and 150 residents. The population fell to 100 in 1933, to ninety-six in 1968, and to twenty-six in 1988 and 1990. The population reached sixty in 2000.