What is the sales tax rate in Williamson County, TX?

The average sales tax rate in Williamson County (TX) is 8.24%, with jurisdictions ranging between 8.00% and 8.25%.

Williamson County • Texas (TX)

23 ZIP Code

Williamson County, TX Sales Tax Rates 2026

2026 sales tax rate guide for Williamson County, TX. Average combined tax rate is 8.24% with local jurisdictions ranging up to 8.25%.

Average Combined Rate

8.24%

Estimated Tax Range: 8.00% - 8.25%

⚡ Direct Tax Answer & Key Takeaway

As of 2026, the local county sales tax rate in Williamson County (Texas) is 0.00%. Combined sales tax rates across cities in this county range from 8.00% to 8.25% (averaging 8.24%).

County Tax

0.00%

Average Combined Rate

8.24%

Max Local Rate

8.25%

Indexed Cities

Cities & Towns in Williamson County

City	Combined Sales Tax Rate	Action
Round Rock	8.25%	View Tax Rates →
Georgetown	8.25%	View Tax Rates →
Cedar Park	8.25%	View Tax Rates →
Leander	8.25%	View Tax Rates →
Hutto	8.25%	View Tax Rates →
Brushy Creek	8.25%	View Tax Rates →
Santa Rita Ranch	8.25%	View Tax Rates →
Jarrell	8.25%	View Tax Rates →
Bartlett	8.25%	View Tax Rates →
Serenada	8.25%	View Tax Rates →
Florence	8.25%	View Tax Rates →
Granger	8.00%	View Tax Rates →
Thrall	8.25%	View Tax Rates →
Coupland	8.25%	View Tax Rates →
Weir	8.25%	View Tax Rates →

📋 State Tax Rules & Compliance Guide

Sourcing Rule: Origin-based for in-state sellers, Destination-based for remote sellers

Groceries & Food: Exempt (0%)

Clothing & Apparel: Taxable (Tax-free weekend annual exception)

SaaS & Digital Goods: Taxable (80% of value taxable, 20% exempt as data processing)

Economic Nexus Threshold: $500,000 in preceding 12 calendar months

Official Tax Authority: Texas Comptroller of Public Accounts ↗

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Address-Specific Rates Rates current for 2026

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ZIP Codes in Williamson County

76511 8.25% 76527 8.25% 76530 8.00% 76537 8.25% 76574 8.25% 76578 8.25% 78613 8.25% 78615 8.25% 78626 8.25% 78627 8.25% 78628 8.25% 78630 8.25% 78633 8.25% 78634 8.25% 78642 8.25% 78646 8.25% 78664 8.25% 78665 8.25% 78674 8.25% 78681 8.25% 78682 8.25% 78683 8.25% 78717 8.25%

❓ Frequently Asked Questions

Key questions and answers regarding sales tax rates, exemptions, and compliance.

The county tax rate for Williamson County is 0.00%. When combined with Texas state taxes and local municipal/district taxes, the overall sales tax rate varies between 8.00% and 8.25%.

In Texas, grocery items are currently Exempt (0%). SaaS and digital automated goods are Taxable (80% of value taxable, 20% exempt as data processing).