Fishing License
You Need a Texas Fishing License to Fish Lake Lavon or Any Public Water
Texas requires a fishing license for anyone age 17 or older fishing in public waters, including Lake Lavon and its tributaries in Collin County.
A Texas fishing license is required for residents and non-residents age 17 and older to fish in any public water in the state. Lake Lavon, managed by the U.S. Army Corps of Engineers, counts as public water. The Texas Parks and Wildlife Department (TPWD) sets size and bag limits for species in Lavon — for example, the white bass daily bag limit is 25 fish, with a 10-inch minimum length.
You can buy a fishing license online at tpwd.texas.gov, at sporting goods stores, or at license vendors around the DFW area. Licenses run on an annual cycle. Check current regulations on the TPWD website before you fish, as species-specific rules can change.
Source to confirm: TPWD – Fishing Regulations for Lavon