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SCHOOL COMMUNITY·ROUND ROCK ISD·NCES 483808004247

Anderson Mill Elementary School

10610 SALT MILL HOLLOW, AUSTIN, TX 78750 · (512) 428-3700 · Williamson County
GRADES PK–05ELEMENTARY11-CITYTITLE IREGULAR SCHOOL585 STUDENTS
Enrollment
585
Elementary
DISTRICT 569 · STATE 519
Student : Teacher
16.7:1
35 FTE teachers
DISTRICT 13.0:1 · STATE 15.1:1
Free / Reduced Lunch
62%
362 students
DISTRICT 34% · STATE 65%
Community
1
0 members
Enrollment and student:teacher ratio compared against other elementary schools. Free/Reduced Lunch and demographics compared against all schools.

Enrollment by grade, 2024-25

GradeStudentsShare
Pre-K275%
Kindergarten8314%
Grade 17914%
Grade 29116%
Grade 311019%
Grade 411620%
Grade 57914%

This year's kindergarten class (83) is 5% larger than its 5th grade class (79).

Student demographics
56%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 74% · STATE 63% · US 70%
White
10818%
DISTRICT 31% · STATE 24% · US 43%
Hispanic
36863%
DISTRICT 32% · STATE 54% · US 30%
Black
448%
DISTRICT 8% · STATE 13% · US 15%
Asian
315%
DISTRICT 22% · STATE 6% · US 6%
Two+
275%
DISTRICT 6% · STATE 3% · US 5%
Native American
31%
DISTRICT 0% · STATE 0% · US 1%
Pacific Islander
41%
DISTRICT 0% · STATE 0% · US 0%
Student head counts by race/ethnicity from federal NCES enrollment data. District, state, and US figures are each group's share of all public school students in that area (US excludes territories). Very small groups may be suppressed in the source, so categories do not always sum exactly to total enrollment.
Gender split
Male
31053%
Female
27547%

Discussions

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Test scores

STAAR 2025-26 . % Meets Grade Level or Above
Reading
48.0%
TX avg 54.5% . +28.0pp since 2020
Mathematics
43.0%
TX avg 45.3% . +26.0pp since 2020

What this means: On the STAAR, Texas's statewide test, about 48 of every 100 students at this school read at grade level and about 43 of 100 do math at grade level. Across all Texas schools, those numbers are about 55 and 45. Reading scores are up about 28 points since 2020, while math scores are up about 26 points.

Performance levels, 2025-26

SubjectMasters Grade LevelMeets Grade LevelApproaches Grade LevelDid Not Meet Grade Level
Reading23.0%25.0%25.0%27.0%
Mathematics17.0%26.0%26.0%31.0%
Share of tested students at each STAAR level. Each student counts in one level, so a row adds to about 100%.

STAAR results by year

School yearReadingMathematics
2025-2648.0%43.0%
2024-2540.0%34.0%
2023-2444.0%38.0%
2022-2324.0%21.0%
2021-2223.0%18.0%
2020-2120.0%17.0%
% Meets Grade Level or Above, all students and all tested grades.
Source: STAAR. All students, all grades. See all years and grades →

BeatsExpectations

Demographically-adjusted score · methodology
Tier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
39.0%
composite math + reading, all grades
Predicted
47.3%
based on TX schools with similar FRL share
Beats by
-8.3pp
below demographic expectation

What this means: About 39% of students here test proficient in math and reading, compared with the roughly 47% typical for Texas schools with a similar share of low-income students. BeatsExpectations measures results against demographically similar schools rather than by raw scores, and this school falls within the typical range, neither among Texas's top nor bottom 10%.

BeatsExpectations runs a per-state regression of proficiency on free/reduced-lunch share, then scores each school by residual. How this is calculated →

Schools most like Anderson Mill Elementary School

Anderson Mill Elementary School's state test result (39.0% proficient) is higher than 1 of the 5 schools below with a result.

SchoolStudentsLow-incomeProficient
Anderson Mill Elementary School this school58561.9%39.0%
Union Hill Elementary School
ROUND ROCK
60263.1%35.4%
Casey Elementary School
AUSTIN
54456.6%48.2%
Fox Run Elementary School
SAN ANTONIO
62058.4%50.5%
Turner Elementary School
PASADENA
52664.4%52.0%
North Ridge Elementary School
LUBBOCK
58558.1%47.1%
Matched among Texas elementary schools on enrollment, the share of students from low-income families (eligible for free or reduced-price lunch), and racial and ethnic makeup. Proficient is the average share of students meeting the state standard across all of the school's state tests in 2023-24 and 2024-25, the same combined score our test-score rankings use. Online schools and schools serving specialized populations are not matched.

Where Anderson Mill Elementary School ranks

Among elementary schools
MeasureThis schoolIn TexasIn Williamson County
State test proficiency
ranked highest first
39.0%#2,730 of 4,401#61 of 86
Math proficiency
ranked highest first
43.0%#2,553 of 4,466
▲ 848
#58 of 87
▲ 9
Reading proficiency
ranked highest first
48.0%#2,794 of 4,466
▲ 728
#67 of 87
▲ 12
3-year test score change
ranked biggest gain first
+23.0pp#369 of 3,998#9 of 78
Enrollment
ranked largest first
585#1,728 of 4,938#53 of 90
Students per teacher
ranked fewest first
16.7:1#3,724 of 4,622#83 of 88
Diversity index
ranked most diverse first
55.9%#1,806 of 4,628#68 of 88
Free and reduced lunch
ranked highest share first
61.9%#3,015 of 4,789#17 of 87
Enrollment change since 2017-18
ranked fastest growth first
+11.9%#672 of 1,307#18 of 30
Ranked against other public elementary schools. Online schools are left out of every list, and test-score lists leave out schools that serve specialized populations. Each rank links to the full list. Arrows under a test-score rank show places moved since the prior test year, among schools tested both years.

4-year change

SY 2020-21 vs SY 2024-25
Enrollment
585
+105 (+22%) vs 2020
-12% since 1990-91, when it was 666
Student : Teacher
16.7:1
was 11.4:1
Source: NCES Common Core of Data

Enrollment and staffing by year

School yearStudentsTeachers (FTE)Students per teacherFree and reduced lunch
2024-2558535.116.7:162% (362)
2023-2450137.113.5:158% (293)
2022-2345535.512.8:158% (262)
2020-214804211.4:148% (228)
2017-1852341.712.5:164% (336)
2015-165153614.3:159% (302)
2010-115213415.3:160% (313)
2000-014893812.9:119% (93)
1990-916664215.9:1N/A
Source: NCES Common Core of Data. Rows are the federal collections on file for Anderson Mill Elementary School.

Since 2017-18: students up 12% (523 to 585); teachers down 16% (41.7 to 35.1).

About Anderson Mill Elementary School

As a medium-sized elementary school, Anderson Mill Elementary School serves students in AUSTIN, Texas. Enrollment in 2024-25 was 585 students in pre-K through 5.

ROUND ROCK ISD is made up of 58 schools with 46,954 students in all.

Anderson Mill Elementary School is 63% Hispanic by enrollment. Smaller groups are 18% White, 8% Black, 5% Asian, and 5% multiracial. County-wide, 25% of Williamson County residents are Hispanic. The school's diversity index is 56%, meaning two students picked at random have a 56% chance of belonging to different racial or ethnic groups.

The school employs the equivalent of 35.1 full-time teachers, for a ratio of 16.7:1. That is higher than the 15.1:1 average for elementary schools in Texas. The free or reduced-price lunch share, often used to gauge student poverty, is 62%. Across public schools in Williamson County, the average is 29%.

The BeatsExpectations prediction for Anderson Mill Elementary School is 47.3%, and its average proficiency rate on state tests is 39.0%.

Recent Census Bureau figures for Williamson County show that the median household income is $111,340, the share of adults with a bachelor's degree or higher is 48%, and roughly 4% of residents are in poverty. Besides Anderson Mill Elementary School, Williamson County has 207 other public schools.

The closest public school, Noel Grisham Middle School, is about 0.3 miles from Anderson Mill Elementary School. Other public schools within five miles: at least 8. On average proficiency, Anderson Mill Elementary School is 9th of 9 nearby schools with test data.

In the federal locale system, Anderson Mill Elementary School is coded City: Large, for schools inside a principal city with a population of 250,000 or more.

Federal data show a 22% enrollment rise, from 480 in 2020-21 to 585 in 2024-25. The student-to-teacher ratio rose from 11.4:1 in 2020-21 to 16.7:1 in 2024-25.

Discussions about Anderson Mill Elementary School may include school events, clubs, and volunteer needs. Questions from prospective families are welcome too.

Williamson County at a glance

View full county profile
Population
672,688
Census ACS
Median income
$111,340
Household, ACS
Bachelor's+
48%
Adults 25+
Poverty rate
4%
Below federal line
Schools in county
208
126,147 students

Quick facts

School name
Anderson Mill Elementary School
District
ROUND ROCK ISD
Address
10610 SALT MILL HOLLOW, AUSTIN, TX 78750
Phone
(512) 428-3700
County
Williamson County
Level
Elementary
Grade range
PK–05
Total enrollment
585
Teachers (FTE)
35
Student–teacher ratio
16.7:1
Free and reduced lunch
362 (62%)
Locale
11-City: Large
NCES ID
483808004247
Charter school
No
Virtual school
No

Related schools

Other schools in ROUND ROCK ISD
Other schools in AUSTIN
Other Anderson Mill Elementary schools

One other US public school is named Anderson Mill Elementary. Anderson Mill Elementary School is the 2nd largest of the 2.

Nearby schools

Frequently asked questions

About Anderson Mill Elementary School
What is the total enrollment at Anderson Mill Elementary School?
Anderson Mill Elementary School enrolls approximately 585 students in grades PK-05.
What age range does Anderson Mill Elementary School serve?
Anderson Mill Elementary School serves students from grade PK through grade 05.
How many students per teacher at Anderson Mill Elementary School?
Approximately 16.7:1 students per teacher at Anderson Mill Elementary School.
How diverse is Anderson Mill Elementary School?
Anderson Mill Elementary School reports a student body of 18% White, 63% Hispanic, 8% Black, 5% Asian, 5% Two or more.
Is Anderson Mill Elementary School public or private?
Anderson Mill Elementary School is a public K-12 school, overseen by ROUND ROCK ISD.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.
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