Jefferson Academy Charter School or JA is a K-12 charter school in unincorporated Jefferson County, Colorado, United States. It is also known as the Jefferson Academy School of Excellence. The K-6 campus is located at 9955 Yarrow Street, Broomfield, Colorado 80021. The 7th –12th grade campus is located at 11251 Reed Way Broomfield, Colorado 80020, about a 12 minute drive away.

Jefferson Academy was founded in 1994. It is a small building, painted green and yellow on the outside. The school is known for its rigorous "college-prep" rigor, and encourages students to prioritize academic growth toward whatever comes next for them post-graduation. Graduates from Jefferson Academy can be found all across the country, to varying degree of commercially defined success. A notable standout would be American Profession golfer Jennifer Kupcho.

In February 2013, Jefferson Academy opened a brand new $9.6 million facility for the junior high and high school students.

Though the school was first known for its men's basketball program, quickly the starring team could be found among the small school's might "Lady Jags" 3A Women's soccer team. The team has consistently ranked highly among others in the league, and is a highly competitive program. Most of the girls play for their local club games as well. Many girls from this program have graduated into playing college-level soccer across the nation. In recent years, this has continued to be true. Recent graduate Kate Runyon was named 2023 Colorado Gatorade Player of the Year, and currently plays for University of Tennessee.

• Official website
• Jefferson Academy Secondary website