The following Texas HamFests have been listed in ARRL or other notifications:

Radio Fiesta 2020, 10-January, Schertz Convention Center, 1400 Schertz Parkway, Schertz, TX 78154, San Antonio Radio Club, https://w5sc.org/

Cowtown HamFest 2020, and ARRL North Texas Section Convention, Forest Hill Civic and Convention Center, 6901 Wichita Street Forest Hill, Texas 76140, January 17-18, 2020 (Fri 3 pm – 7 pm and Sat 7 am – 3 pm), http://www.cowtownhamfest.com. Talk In Frequency 146.94 MHz, Tone 110.9.

2020 Greater Houston HamFest, Fort Bend Fairgrounds, Rosenberg, TX, Brazos Valley Amateur Radio Club, Saturday 07-March (Setup – Saturday, 6 am – 8 am; Main event – Saturday, 8 am – 2 pm), http://houstonhamfest.org/.
(Date for year 2021 is 06-March)

2020 HamCom, 12- and 13-June (12-June 12:00 pm – 5:00 pm, Saturday, 13-June 8:00 am – 5:00 pm), Plano Event Center, 2000 E Spring Creek Pkwy, Plano, TX 75074 (https://sites.google.com/hamcom.org/ham-com).

Other Noteworthy Ham Conventions

W4DXCC (DX and Contest Convention), September 25-26, 2020, Pigeon Forge, TN, MainStay Hotel and Conference Center.