The school was the 40th-ranked public high school in New Jersey out of 314 schools statewide, in New Jersey Monthly magazine's September 2008 cover story on the state's Top Public High Schools. The school was ranked 36th in the magazine's September 2006 issue, which included 316 schools across the state.
Indian Hills High School has a long-standing rivalry with Ramapo High School, most notably with the school's football, swimming, and fencing teams.
The 2003 Girls Soccer team won the North I Group II tournament, defeating River Dell Regional High School 1-0 in the final.
The Girls Softball team won the 2003 North I, Group II title over Hopatcong High School, winning by a score of 6-1.
In 2005, the Girls Tennis team took the North I, Group II championship, beating Tenafly High School 3½-1½.
The baseball team took the North I, Group II state sectional title in 2007 with a 5-0 win over Westwood Regional High School.
The Academic Decathlon team (which receives a varsity letter) won the state championship in 2006 and in 2007. They attended the national USAD competition in San Antonio, TX in 2006, and the national USAD competition in Honolulu, Hawaii in 2007.