Merrimack Valley is a four-year high school located in Penacook, a village in the northern part of Concord, New Hampshire.

The school has approximately 900 students and serves the communities of Andover, Boscawen, Loudon, Penacook, Salisbury, and Webster.

The faculty, staff, students, and community began self-study for reaccreditation in 2009; the next visiting team came in 2011.

In 2003, the school was recognized by the New Hampshire Excellence in Education award (EDies) for being the best high school in the state of New Hampshire.

[citation needed] There are six Advanced Placement courses currently available at Merrimack Valley: In addition, the school offers several Project Running Start courses through NHTI in Concord.