Chelsea High School (Ranked Bottom 50% for 2025-26)

299 Everett Avenue
Chelsea, MA 02150

( shown in map)

Bottom 50%

The Chelsea High School is located in Chelsea, Massachusetts, United States and is the only public high school in Chelsea. It is a part of Chelsea 51�Թ��. Established in 1845, Chelsea High moved into its current school building in 1996.

Serving 1,680 students in grades 9-12, Chelsea High School ranks in the bottom 50% of all schools in Massachusetts for overall test scores (math proficiency is bottom 50%, and reading proficiency is bottom 50%).

The percentage of students achieving is 20% (which is lower than the Massachusetts state average of 42%). The percentage of students achieving is 30% (which is lower than the Massachusetts state average of 44%).

The student-teacher ratio of 14:1 is higher than the Massachusetts state level of 12:1.

Minority enrollment is 95% of the student body (majority Hispanic), which is higher than the Massachusetts state average of 47% (majority Hispanic).

Quick Facts (2025-26)

Grades: 9-12
Enrollment: 1,680 students
Student-Teacher Ratio: 14:1
Minority Enrollment: 95%
: 76% (Btm 50% in MA)
: Bottom 50%
: 20% (Btm 50%)
: 30% (Btm 50%)
: 28% (Btm 50%)
Source: National Center for Education Statistics (NCES), MA Dept. of Education

Top Rankings

Chelsea High School ranks among the top 20% of public schools in Massachusetts for:

School Overview

Chelsea High School's student population of 1,680 students has grown by 23% over five school years.

The teacher population of 116 teachers has stayed relatively flat over five school years.

Grades Offered

Grades 9-12
(Supplemental Virtual)

View Data

Distribution of Students By Grade Trends
Grade	Chelsea High School
9	488
10	439
11	404
12	344
Not Listed	5

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Total Students

1,680 students

View Data

Total Students Trends Over Years (1991-2023)
Year	Chelsea High School
2023	1,611
2022	1,498
2021	1,455
2020	1,360
2019	1,360
2018	1,545
2017	1,545
2016	1,521
2015	1,527
2014	1,408
2013	1,372
2012	1,330
2011	1,353
2010	1,369
2009	1,424
2008	1,477
2007	1,501
2006	1,484
2005	1,422
2004	1,296
2003	1,272
2002	1,169
2001	1,109
2000	1,038
1999	1,123
1998	1,112
1997	1,020
1996	866
1995	903
1994	798
1993	838
1992	835
1991	1,089

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Gender %

Total Classroom Teachers

116 teachers

View Data

Total Classroom Teachers Trends Over Years (2005-2023)
Year	Chelsea High School
2023	110
2022	119
2021	104
2020	119
2019	119
2018	113
2017	113
2016	111
2015	107
2014	110
2013	109
2012	105
2011	107
2010	112
2009	117
2008	122
2007	122
2006	129
2005	110

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Year Founded

1905

School Calendar

School Mascot

Red Devil

School Rankings

Chelsea High School ranks within the bottom 50% of all 1,626 schools in Massachusetts (based off of combined math and reading proficiency testing data).

The of Chelsea High School is 0.21, which is less than the diversity score at state average of 0.65. The school's diversity has stayed relatively flat over five school years.

This School

State Level (MA)

#1313 out of 1626 schools
(Bottom 50%)

View Data

Overall School Rank Trends Over Years (2012-2023)
Year	Chelsea High School
2023	#1313
2022	#1202
2021	#1376
2019	#1458
2018	#894
2017	#784
2016	#1306
2015	#883
2014	#770
2013	#789
2012	#937

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20%

42%

View Data

Math Proficiency Comparison Over Years (2012-2023)
Year	Chelsea High School	Massachusetts	Chelsea School District
2023	20%	42%	18%
2022	29%	41%	17%
2021	15%	37%	12%
2019	28%	51%	27%
2018	37%	52%	29%
2017	43%	53%	28%
2016	40%	64%	38%
2015	51%	61%	37%
2014	57%	61%	40%
2013	59%	61%	40%
2012	56%	59%	41%

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30%

44%

View Data

Reading and Language Arts Proficiency Comparison Over Years (2011-2022)
Year	Chelsea High School	Massachusetts	Chelsea School District
2022	30%	44%	19%
2021	27%	49%	24%
2019	30%	54%	32%
2018	67%	56%	29%
2017	69%	54%	28%
2016	64%	71%	38%
2015	80%	69%	35%
2014	78%	69%	39%
2013	77%	69%	42%
2012	71%	69%	44%
2011	60%	70%	47%

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28%

44%

Student-Teacher Ratio

14:1

12:1

View Data

Student-Teacher Ratio Comparison Over Years (2005-2023)
Year	Chelsea High School	Massachusetts	Chelsea School District
2023	15:1	12:1	13:1
2022	13:1	12:1	13:1
2021	14:1	12:1	14:1
2020	11:1	13:1	14:1
2019	11:1	13:1	14:1
2018	14:1	13:1	15:1
2017	14:1	13:1	15:1
2016	14:1	13:1	15:1
2015	14:1	13:1	15:1
2014	13:1	14:1	15:1
2013	13:1	14:1	14:1
2012	13:1	14:1	14:1
2011	13:1	14:1	14:1
2010	12:1	14:1	13:1
2009	12:1	14:1	14:1
2008	12:1	14:1	13:1
2007	12:1	13:1	13:1
2006	12:1	13:1	12:1
2005	13:1	14:1	12:1

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American Indian

n/a

Asian

View Data

Asian Student Percentage Comparison Over Years (1992-2023)
Year	Chelsea High School	Massachusetts	Chelsea School District
2023	1%	7%	1%
2022	1%	7%	1%
2020	2%	7%	1%
2019	2%	7%	1%
2018	2%	8%	1%
2017	2%	8%	1%
2016	2%	6%	1%
2015	2%	6%	3%
2014	3%	6%	2%
2013	3%	6%	2%
2012	4%	6%	3%
2011	4%	7%	3%
2010	4%	6%	3%
2009	4%	6%	3%
2008	4%	6%	4%
2007	5%	6%	4%
2006	5%	6%	4%
2005	5%	5%	4%
2004	7%	5%	5%
2003	8%	5%	6%
2002	10%	5%	6%
2001	10%	4%	6%
2000	11%	4%	6%
1999	11%	4%	7%
1998	9%	4%	8%
1997	12%	4%	9%
1996	13%	4%	8%
1995	14%	4%	10%
1994	14%	4%	10%
1993	14%	4%	11%
1992	15%	4%	12%

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Hispanic

89%

25%

View Data

Hispanic Student Percentage Comparison Over Years (1991-2023)
Year	Chelsea High School	Massachusetts	Chelsea School District
2023	89%	24%	88%
2022	90%	23%	88%
2021	89%	22%	87%
2020	87%	21%	86%
2019	87%	21%	86%
2018	85%	19%	86%
2017	85%	19%	86%
2016	85%	19%	85%
2015	83%	18%	78%
2014	79%	17%	82%
2013	78%	16%	81%
2012	77%	16%	81%
2011	77%	15%	81%
2010	79%	15%	82%
2009	79%	14%	81%
2008	77%	15%	80%
2007	74%	14%	77%
2006	72%	13%	77%
2005	70%	12%	74%
2004	68%	12%	73%
2003	68%	11%	72%
2002	64%	11%	70%
2001	64%	11%	68%
2000	62%	10%	69%
1999	64%	10%	68%
1998	66%	10%	68%
1997	63%	10%	67%
1996	64%	9%	66%
1995	65%	9%	67%
1994	66%	9%	65%
1993	60%	9%	61%
1992	59%	8%	59%
1991	56%	8%	55%

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Black

10%

View Data

Black Student Percentage Comparison Over Years (1991-2023)
Year	Chelsea High School	Massachusetts	Chelsea School District
2023	4%	10%	5%
2022	3%	10%	4%
2021	4%	10%	5%
2020	6%	9%	5%
2019	6%	9%	5%
2018	7%	9%	6%
2017	7%	9%	6%
2016	6%	9%	6%
2015	8%	9%	8%
2014	10%	9%	7%
2013	10%	9%	8%
2012	9%	8%	7%
2011	9%	8%	7%
2010	8%	8%	7%
2009	8%	8%	7%
2008	8%	8%	7%
2007	8%	8%	8%
2006	9%	8%	8%
2005	9%	9%	8%
2004	9%	9%	7%
2003	8%	9%	7%
2002	8%	9%	7%
2001	9%	9%	8%
2000	11%	9%	8%
1999	8%	9%	8%
1998	9%	8%	8%
1997	8%	8%	7%
1996	8%	8%	6%
1995	8%	8%	5%
1994	6%	7%	4%
1993	5%	7%	5%
1992	5%	7%	6%
1991	4%	8%	5%

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White

53%

View Data

White Student Percentage Comparison Over Years (1991-2023)
Year	Chelsea High School	Massachusetts	Chelsea School District
2023	5%	54%	6%
2022	5%	56%	7%
2021	5%	57%	6%
2020	5%	59%	7%
2019	5%	59%	7%
2018	6%	61%	7%
2017	6%	61%	7%
2016	7%	63%	7%
2015	7%	64%	9%
2014	8%	65%	8%
2013	9%	66%	8%
2012	9%	67%	8%
2011	10%	68%	8%
2010	9%	69%	8%
2009	9%	70%	8%
2008	11%	71%	9%
2007	13%	72%	11%
2006	14%	73%	11%
2005	16%	74%	14%
2004	16%	74%	15%
2003	16%	75%	15%
2002	18%	75%	17%
2001	17%	76%	18%
2000	16%	77%	17%
1999	17%	77%	17%
1998	16%	78%	16%
1997	17%	78%	17%
1996	15%	79%	20%
1995	13%	79%	18%
1994	14%	80%	21%
1993	21%	80%	23%
1992	21%	81%	23%
1991	25%	81%	27%

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Hawaiian

n/a

Two or more races

View Data

Two or More Races Student Percentage Comparison Over Years (2012-2023)
Year	Chelsea High School	Massachusetts	Chelsea School District
2023	1%	5%
2022	1%	4%
2021	2%	4%	2%
2012	1%	3%	1%

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All Ethnic Groups

0.21

0.65

View Data

Diversity Score Comparison Over Years (1991-2023)
Year	Chelsea High School	Massachusetts	Chelsea School District
2023	0.21	0.64	0.23
2022	0.19	0.62	0.22
2021	0.21	0.62	0.24
2020	0.24	0.60	0.25
2019	0.24	0.60	0.25
2018	0.27	0.58	0.26
2017	0.27	0.58	0.26
2016	0.27	0.56	0.27
2015	0.30	0.55	0.32
2014	0.36	0.54	0.32
2013	0.39	0.53	0.33
2012	0.39	0.52	0.33
2011	0.39	0.51	0.33
2010	0.36	0.50	0.32
2009	0.38	0.51	0.34
2008	0.39	0.47	0.35
2007	0.43	0.46	0.38
2006	0.46	0.45	0.40
2005	0.48	0.43	0.42
2004	0.51	0.43	0.44
2003	0.50	0.42	0.45
2002	0.55	0.41	0.48
2001	0.55	0.40	0.50
2000	0.58	0.39	0.52
1999	0.55	0.39	0.53
1998	0.53	0.38	0.53
1997	0.56	0.38	0.54
1996	0.55	0.36	0.54
1995	0.54	0.36	0.54
1994	0.53	0.35	0.57
1993	0.58	0.35	0.59
1992	0.59	0.34	0.59
1991	0.61	0.33	0.61

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76%

90%

View Data

Graduation Rate Comparison Over Years (2013-2023)
Year	Chelsea High School	Massachusetts	Chelsea School District
2023	76%	90%	67%
2022	76%	90%	66%
2021	75%	87%	67%
2020	74%	88%	66%
2019	72%	88%	64%
2018	60%	87%	59%
2017	59%	87%	57%
2016	63%	87%	60%
2015	66%	87%	63%
2014	66%	86%	64%
2013	66%	85%	64%

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Participates in the

Yes

Eligible for

66%

35%

View Data

Free Lunch Eligibility Comparison Over Years (2000-2023)
Year	Chelsea High School	Massachusetts	Chelsea School District
2023	69%	35%	81%
2022	74%	35%	82%
2021	77%	36%	85%
2020	82%	35%	84%
2019	82%	35%	84%
2015	72%	36%	80%
2014	64%	34%	76%
2013	76%	32%	82%
2012	61%	30%	71%
2011	69%	29%	75%
2010	79%	27%	81%
2009	57%	25%	67%
2008	74%	24%	78%
2007	72%	23%	75%
2006	67%	23%	75%
2005	76%	23%	80%
2004	74%	22%	81%
2001	62%	19%	67%
2000	62%	20%	68%

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Eligible for

View Data

Reduced-Price Lunch Eligibility Comparison Over Years (2001-2023)
Year	Chelsea High School	Massachusetts	Chelsea School District
2023	7%	4%	7%
2022	8%	4%	7%
2021	8%	4%	7%
2020	9%	4%	7%
2019	9%	4%	7%
2015	7%	4%	6%
2014	7%	5%	7%
2013	9%	5%	7%
2012	7%	5%	7%
2011	7%	5%	7%
2010	10%	6%	10%
2009	10%	6%	11%
2008	9%	5%	9%
2007	10%	5%	10%
2001	12%	5%	15%

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School Statewide Testing

School District Name

Chelsea School District

Source: National Center for Education Statistics (NCES), MA Dept. of Education

School Notes

School Mascot: Red Devil

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Frequently Asked Questions

What is Chelsea High School's ranking?

Chelsea High School is ranked #1313 out of 1,626 schools, which ranks it among the bottom 50% of public schools in Massachusetts.

What percent of students have achieved state testing proficiency in math and reading?

20% of students have achieved math proficiency (compared to the 42% MA state average), while 30% of students have achieved reading proficiency (compared to the 44% MA state average).

What is the graduation rate of Chelsea High School?

The graduation rate of Chelsea High School is 76%, which is lower than the Massachusetts state average of 90%.

How many students attend Chelsea High School?

1,680 students attend Chelsea High School.

What is the racial composition of the student body?

89% of Chelsea High School students are Hispanic, 5% of students are White, 4% of students are Black, 1% of students are Asian, and 1% of students are Two or more races.

What is the student-teacher ratio of Chelsea High School?

Chelsea High School has a student ration of 14:1, which is higher than the Massachusetts state average of 12:1.

What grades does Chelsea High School offer ?

Chelsea High School offers enrollment in grades 9-12 (Supplemental Virtual).

What school district is Chelsea High School part of?

Chelsea High School is part of Chelsea School District.