In 2005, the graduating class of Millis High School was 73 students, which was one of the larger classes of the past few years. The class of 2009 surpassed the class of 2005 with its student body of 75 individuals, and the class of 2010 exceeded the previous year. In total, the high school has around 350-400 students. The class of 2012 had 87. The class of 2014 had as many as 110 students. In 2016, the graduation class was 95.
History
On April 14, 1973, Aerosmith played a concert there. In 1999, Millis Middle/High School underwent a complete renovation. Millis came in tenth in the state in the Math portion of the MCAS in 2006, while also ranking first in the state with Boston Latin School for English MCAS scores. In 2007, Millis was awarded the Blue Ribbon School Of Excellence award by the Federal Government under the No Child Left Behind Act.
Athletics
Girls volleyball
The girls' volleyball team for Millis has had some success over the past couple years. Div. III State Champs '03, South Sectional Champs '03, Eastern Mass Champs '03, Central Sectional Champs '07, Div. III State Champs '08, Central Sectional Champs '08, Central Sectional Champs '10, Central Sectional Champs '11.
Boys volleyball
The boys' volleyball were state champions in 2003.
Football
The Millis High School football team won the State Championship in 1980, 1994, 1999, 2016 and 2017.
Boys soccer
The boys' soccer team went to the state tournament in 1995 and 1998.
Girls soccer
The girls varsity soccer team were the South Sectional Championship in the fall of 2009 and were named Division III State Champions.
Students from Millis High School and Hopedale High School have joined together to form the Hopedale/Millis hockey team. The team plays in the Central Mass. Russell Conference. Home games are played at the Blackstone Valley IcePlex in Hopedale, Massachusetts.
Girls ice hockey
Girls in grades 7–12 at Millis combine with other high school students from Medway, Ashland, and Holliston and play on the Medway/Ashland girls hockey team. They have been a team for 3 years and have qualified for the MIAA Division 1 state tournament each year.
Girls basketball
Girls basketball qualified for the MIAA tournament every year since 2002. In the 2008–09 season they became the Division 4 State Champions. They repeated as Division 4 State Champions in 2014–15. Accomplishments:
State Champions: 2009, 2014, 2015
Boys basketball
The boysbasketball team in 2011–2012 had a record of 4–7. They qualified for MIAA Division 4 state tournament, won their preliminary against C.A.S.H and went on to beat Holbrook, the top seed in their division with a score of 49-42. They lost their second-round game to Cathedral.
Cheerleading
The Varsity Cheerleading squad combined with Hopedale in 2012. Tri-Valley League Champs '77, '80.
Track
Millis has both boys and girls indoor and outdoor, track. Indoor track is during the winter and outdoor track is in the spring. In the 2009–10 winter track season, a Millis high jumper won five state championships. State Champs '80.
Baseball
Tri-Valley League Champs '73, '81, Eastern Mass South Sectional Champs '73, '87..
Softball
In the 2012 season the team qualified for state tournament, winning their preliminary round game against Old Colony Regional Voc. Tech. Tri-Valley League Champs '71, '81. Eastern South Sectional Champs '04.
