Fatal crashes in Williamson County, Texas
In 2024, 51 people died in 50 fatal crashes in Williamson County, Texas, 18.6% more than in 2023. From 2015 to 2024 the county recorded 426 fatal crashes and 465 deaths, the 14th most of 254 counties in Texas.
7 deaths per 100,000 residents, against 13.3 across Texas in 2024; 7.6 against 13.6 a year over 2015 to 2024. Population 727,480, Census Bureau estimate. All fatal crashes in Texas.
Deaths in Williamson County by year
| Year | Fatal crashes | Deaths |
|---|---|---|
| 2024 | 50 | 51 |
| 2023 | 41 | 43 |
| 2022 | 59 | 66 |
| 2021 | 51 | 54 |
| 2020 | 39 | 43 |
| 2019 | 36 | 39 |
| 2018 | 36 | 42 |
| 2017 | 36 | 38 |
| 2016 | 41 | 45 |
| 2015 | 37 | 44 |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
The deadliest roads in Williamson County
I-35 had the most fatal crashes of any numbered road in Williamson County from 2015 to 2024: 42, with 44 deaths. The 8 roads listed held 43% of all fatal crashes in Williamson County from 2015 to 2024; 1 is an interstate, 2 US routes, 5 state highways. 45% of the county's fatal crashes were on an interstate, US or state route; the other 55% were on county roads and city streets. Routes are listed from 5 fatal crashes.
| Road | Fatal crashes | Deaths | 2022 to 2024 | ||
|---|---|---|---|---|---|
| 1 | I-35 | 42 | 44 | 11 | |
| 2 | US 183 | 36 | 42 | 15 | |
| 3 | State Highway 29 | 29 | 33 | 8 | |
| 4 | State Highway 195 | 23 | 27 | 6 | no page |
| 5 | State Highway 95 | 21 | 24 | 11 | |
| 6 | US 79 | 19 | 21 | 4 | |
| 7 | State Highway 45 | 9 | 10 | 6 | no page |
| 8 | State Highway 130 | 6 | 6 | 2 |
Round Rock had 13% of the county's fatal crashes from 2015 to 2024, 55 of 426.
Cities NHTSA filed, with their fatal crashes from 2015 to 2024: Round Rock 55, Georgetown 50, Austin 27, Cedar Park 25, Leander 25, Taylor 24, Jarrell 10, Hutto 10. The city is not filed for crashes outside a city.
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
When fatal crashes happen in Williamson County
The heaviest slot is Saturday, midnight to 4 am (the night from Friday), with 19 fatal crashes from 2015 to 2024. The worst hour is 6 pm to 7 pm; the worst month is May.
| Midnight to 4 | 4 to 8 am | 8 to noon | Noon to 4 | 4 to 8 pm | 8 to midnight | |
|---|---|---|---|---|---|---|
| Sun | 2.6 percent, 11 fatal crashes | 2.6 percent, 11 fatal crashes | 1.2 percent, 5 fatal crashes | 2.6 percent, 11 fatal crashes | 2.8 percent, 12 fatal crashes | 2.6 percent, 11 fatal crashes |
| Mon | 0.9 percent, 4 fatal crashes | 1.9 percent, 8 fatal crashes | 2.6 percent, 11 fatal crashes | 1.4 percent, 6 fatal crashes | 3.8 percent, 16 fatal crashes | 3.1 percent, 13 fatal crashes |
| Tue | 1.6 percent, 7 fatal crashes | 2.4 percent, 10 fatal crashes | 2.1 percent, 9 fatal crashes | 0.9 percent, 4 fatal crashes | 2.6 percent, 11 fatal crashes | 1.9 percent, 8 fatal crashes |
| Wed | 1.6 percent, 7 fatal crashes | 2.6 percent, 11 fatal crashes | 2.6 percent, 11 fatal crashes | 2.4 percent, 10 fatal crashes | 1.6 percent, 7 fatal crashes | 3.3 percent, 14 fatal crashes |
| Thu | 1.6 percent, 7 fatal crashes | 1.2 percent, 5 fatal crashes | 2.1 percent, 9 fatal crashes | 3.1 percent, 13 fatal crashes | 3.1 percent, 13 fatal crashes | 2.1 percent, 9 fatal crashes |
| Fri | 1.4 percent, 6 fatal crashes | 2.4 percent, 10 fatal crashes | 2.1 percent, 9 fatal crashes | 1.2 percent, 5 fatal crashes | 3.8 percent, 16 fatal crashes | 3.5 percent, 15 fatal crashes |
| Sat | 4.5 percent, 19 fatal crashes | 1.9 percent, 8 fatal crashes | 2.6 percent, 11 fatal crashes | 3.3 percent, 14 fatal crashes | 2.8 percent, 12 fatal crashes | 3.8 percent, 16 fatal crashes |
By hour
By month
- Jan7.3%
- Feb7.0%
- Mar4.9%
- Apr8.5%
- May10.3%
- Jun8.0%
- Jul8.0%
- Aug7.7%
- Sep9.9%
- Oct8.2%
- Nov10.1%
- Dec10.1%
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
What fatal crashes in Williamson County first hit
The first harmful event was a collision with another vehicle in most fatal crashes, 51%; a fixed object such as a tree, pole or barrier in 24%, a pedestrian in 12%, a rollover in 5.4%.
| First harmful event | Fatal crashes | Share |
|---|---|---|
| Collision with another vehicle | 215 | 51% |
| Fixed object (tree, pole, barrier, ditch) | 101 | 24% |
| Pedestrian | 51 | 12% |
| Rollover | 23 | 5.4% |
| Other | 17 | 4.0% |
| Cyclist | 13 | 3.1% |
| Parked vehicle | 6 | 1.4% |
| Not reported | 0 | 0.0% |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
How fatal crashes in Williamson County compare with Texas
The largest difference from Texas: from 2015 to 2024, 33% of occupants killed in Williamson County were unbelted, against 45% across Texas. Also above the Texas share: intersections. Below it: pedestrians. Shares of fatal crashes from 2015 to 2024, against the share across all of Texas. A share is only given over 20 crashes; above or below means more than chance would give on 426 crashes.
| Williamson | Texas | ||
|---|---|---|---|
| On rural roads | 39% | 38% | about the same as the Texas share |
| At or near an intersection | 31% | 22% | above the Texas share |
| In the dark, road unlit | 32% | 31% | about the same as the Texas share |
| A drinking driver | 23% | 26% | about the same as the Texas share |
| Speeding | 32% | 32% | about the same as the Texas share |
| A distracted driver (as recorded) | 8.5% | 10% | about the same as the Texas share |
| Occupants killed unbelted | 33% | 45% | below the Texas share |
| Hit-and-run | 5.9% | 7.6% | about the same as the Texas share |
| A motorcycle involved | 16% | 14% | about the same as the Texas share |
| Pedestrians among the dead | 13% | 18% | below the Texas share |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
Questions about fatal crashes in Williamson County, Texas
- How many people died in car accidents in Williamson County in 2024?
- 51 people died in 50 fatal crashes in Williamson County, Texas, in 2024, 18.6% more than in 2023. That is 7 deaths per 100,000 residents, against 13.3 across Texas. Source: NHTSA's Fatality Analysis Reporting System (FARS).
- What is the deadliest road in Williamson County?
- I-35 had the most fatal crashes of any numbered road in Williamson County from 2015 to 2024: 42, with 44 deaths.
- When do fatal crashes in Williamson County happen most often?
- The heaviest slot from 2015 to 2024 was Saturday, midnight to 4 am (the night from Friday), with 19 fatal crashes.
- How many fatal crashes in Williamson County involved a drinking driver?
- 99 of 426 fatal crashes in Williamson County from 2015 to 2024 involved a driver NHTSA recorded as drinking, 23%, against 26% across Texas.
Other counties in Texas with a page
- Harris County
- Dallas County
- Bexar County
- Tarrant County
- Travis County
- El Paso County
- Hidalgo County
- Montgomery County
- Collin County
- Smith County
- Denton County
- Bell County
All fatal crashes in Texas, with every county ranked.
Where the Williamson County numbers come from
Counted from NHTSA's Fatality Analysis Reporting System, 2024 Annual Report File: every fatal crash NHTSA filed in Williamson County (county code 491). A fatal crash is one in which someone died within 30 days. The rate per 100,000 uses the Census Bureau's population estimate for the county; it is the only figure here not counted from FARS. Totals from state highway departments and news reports can differ: they count from their own crash reports, often before every death within 30 days is known, while NHTSA's file is checked against death certificates and revised once a year. The full method.
Download every county with a page as CSV. Free to reuse with credit: “Fatal Crash Data, fatalcrashdata.com/fatal-crashes/texas/williamson-county/, from NHTSA FARS (2024 Annual Report File).”