Zachary, P. H.	4-1-1947	Electrocuted	Williamson	Huntsville, TX	285	Murder
Zapata	mid-1840	Chopped off head	Webb	NW of Laredo, TX	n/a	Revolution	His head was displayed as a warning.

Sources:
Texas Department of Criminal Justice Home Page for executions after 1977.  
The Rope, The Chair, And The Needle by James W. Marquart, ©1994, University of Texas Press for those executions before 1977.
Without Sanctuary by James Allen and John Littlefield, © 2000, for early lynchings in Texas.