Nelson William Wolff (born October 27, 1940) is a retired American judge and Democratic politician from San Antonio, Texas.

In Challenge of Change, he describes his experience in the Texas legislature and his participation in the 1974 Constitutional Convention, of which he was instrumental in bringing about.

He also authored the book 95 Power Principles: Strategies for Effective Leadership in Government, which documents the lessons learned over his decades in public service and in business.

[9] He defeated in the general election the Republican candidate, Carlton L. Soules, a former member of the San Antonio City Council from the North Side.

Known as a "budget hawk" while on the council, Soules since entered into an alliance with the unsuccessful 2017 San Antonio mayoral candidate Manuel Medina, the chairman of the Bexar County Democratic Party organization.

They agreed on a proposal to build a rail system with the use of eighteen miles of existing Union Pacific track from downtown San Antonio to Leon Springs.