| Barry Ashlin Williamson | |
| Chairman of the Texas Railroad Commission | |
| Term Start: | January 1997 |
| Term End: | June 1998 |
| Preceded: | Carole Keeton Rylander |
| Succeeded: | Carole Keeton Rylander |
| Title2: | Railroad Commissioner of Texas |
| Term Start2: | January 5, 1993 |
| Term End2: | January 3, 1999[1] |
| Preceded2: | Jim Wallace |
| Succeeded2: | Tony Garza |
| Governor: | George W. Bush |
| Birth Date: | 19 June 1957 |
| Birth Place: | Arkansas, U.S. |
| Party: | Republican |
| Spouse: | Holly Holt Williamson |
| Children: | Holt and Ashlin Williamson |
| Residence: | Austin, Texas |
| Occupation: | Attorney |
Barry Ashlin Williamson (born June 19, 1957) is an attorney from Austin, Texas, who was from 1992 to 1999 a Republican member of the Texas Railroad Commission. In 1992, he defeated the appointed incumbent Lena Guerrero, a Democrat, to win a seat on the three-member panel which regulates oil and natural gas operations (not railroads).[2]