Nelson William Wolff (born 1940) is a San Antonio, Texas, U.S. political figure. He represented Bexar County as a Democrat in the Texas House of Representatives from 1971 to 1973, and the Texas Senate from 1973 to 1975. He served on the San Antonio City Council as the representative of Council District 8 and then as mayor of San Antonio from 1991 to 1995 and currently serves as Bexar County Judge.