Total enrollment
126,075
+14,549 (+13%) vs SY 2020-21
Williamson County
Texas · Public K-12
Of the public K-12 schools operating across Texas, 208 sit inside Williamson County, collectively enrolling roughly 126,147 students (121 elementary, 34 middle, and 43 high).
4-year change in Williamson County
SY 2020-21 vs SY 2024-25School count
172
+20 (+13%) vs SY 2020-21
Source: NCES Common Core of Data, enrollment-weighted demographic averages
How Williamson County ranks
Among counties| Measure | This county | In Texas | In the US |
|---|---|---|---|
| State test proficiency ranked highest first | 56.2% | #19 of 192 | N/A |
| Enrollment ranked largest first | 126,147 | #12 of 196 | #70 of 2,745 |
| Number of schools ranked most first | 173 | #12 of 196 | N/A |
| Students per teacher ranked fewest first | 14.4:1 | #136 of 196 | #1,563 of 2,655 |
| Free or reduced-price lunch share ranked highest first | 28.7% | #194 of 196 | #2,420 of 2,526 |
| Diversity index ranked most diverse first | 71.3% | #6 of 192 | #65 of 2,707 |
Counties need at least 3 schools and 1,000 students to be ranked. Test proficiency is ranked within the state only, since each state gives a different test. Each rank links to the full list.
Williamson County school rankings
Residents
672,688
all ages · ACS 5-yr
Schools
208
23 districts
Enrollment
126,147
students · NCES CCD
Median income
$111,340
Above Texas avg
Free/reduced lunch
28.7%
Below Texas avg
Elementary
121
55,150 students
Middle
34
27,937 students
High
43
36,954 students
Combined / other
10
6,106 students
LARGEST DISTRICT
ROUND ROCK ISD
38,657 students · 23 districts in Williamson County
County vs. school enrollment demographics
Left bar is the racial makeup of Williamson County residents (Census ACS 5-year). Right bar is the enrollment-weighted makeup of public schools in the county (NCES CCD). NCES systematically under-reports Hispanic, Pacific Islander, and Native American enrollment for many schools; where the resident share is meaningful but the reported school share is zero, we mark the school bar "not reported".
County residents
School enrollment
Bachelor's+
48.4%
adults 25+
Poverty rate
4.4%
ACS 5-year
Unemployment
3.9%
civilian labor
Median age
37
24.1% under 18
Test scores in Williamson County
Latest 2025-26 ELA proficiency, 145 schools ranked. Texas state average: 55.6%.
Top 5 schools (ELA)
- BASIS CEDAR PARK· 98.0%
- CACTUS RANCH EL· 93.0%
- PATSY SOMMER EL· 93.0%
- LEGACY EARLY COLLEGE H S· 92.0%
- RRISD EARLY COLLEGE H S· 92.0%
Lowest 5 schools (ELA)
- ANNIE PURL EL· 33.0%
- DOUBLE CREEK EL· 34.0%
- BAGDAD EL· 39.0%
- BLUEBONNET EL· 39.0%
- VIC ROBERTSON EL· 39.0%
| Name | City | Level | Grades | Enrollment | Rating |
|---|---|---|---|---|---|
| STEP - JJAEP | Georgetown | Elementary | M-M | · | · |
| STEP - JJAEP | Georgetown | Elementary | M-M | · | · |
| STEP - JJAEP | Georgetown | Elementary | M-M | · | · |
| STEP CORE/JJAEP | Georgetown | Elementary | M-M | · | · |
| STEP DETENTION CENTER | Granger | Elementary | M-M | · | · |
| STEP- DETENTION | Georgetown | Elementary | M-M | · | · |
| STEP- JJAEP | Georgetown | Elementary | M-M | · | · |
| WILLIAMSON CO J J A E P | Bartlett | Elementary | M-M | · | · |
Cities in Williamson County
About Williamson County
In Texas, Williamson County is a broad county of about 672,688 residents. 208 public schools across the county instructs about 126,147 students between them.
Looking at the broader picture, census numbers show the median household earns about $111,340 a year, 48% of adults hold a bachelor's degree or higher, and the poverty rate is around 4%. That income level is 67% above the Texas median.
On the school-mix side, Williamson County is made up of 121 elementary schools (55,150 students), 34 middle schools (27,937), 43 high schools (36,954), and 10 combined or other schools.
ROUND ROCK ISD dominates the local landscape, accounting for roughly 38,657 students on its own.
Over the past 4-year window. Combined enrollment now sits at 126,075 students, rose 13% from the 111,526 reported in SY 2020-21. The school count climbed from 152 to 172 across the same 4-year window.
On this page, the community for Williamson County discusses open enrollment windows, redistricting talk, and busing logistics. Parents, students, and educators in the area can post or comment.
Frequently asked questions
DATA · Census ACS 5-year · NCES Common Core of Data