Sport Clubs at Colorado State University were established in 1978. They are run and funded by student fees and team fundraisers and compete with other colleges and universities but not at the NCAA level. There are currently 30 Sport Club teams. Every year the clubs take a combined 150 trips. There are over 1,000 students associated with the program. Last year 23 of these teams competed at regional and national championships. The programs have enjoyed a significant amount of recent success with National Championships in: Men's Ice Hockey (1995) Women's Lacrosse (2008, 2010, 2011, 2013); Baseball (2004–2010); Men's Lacrosse (1999, 2001, 2003, 2006, 2012).

The sport clubs at Colorado State University include: Alpine Ski Team, Baseball, Bowling (Coed), Crew, Cycling, Field Hockey, Horse Polo (Men's and Women's), Ice Hockey (Men's and Women's), In-Line Hockey, Lacrosse (Men's and Women's), Logging Sports, Rodeo (Men's and Women's), Rugby (Men's and Women's), Shotgun Sports (Men's and Women's), Snowboard, Soccer (Men's and Women's), Synchronized Ice Skating, Triathlon (Coed), Ultimate Frisbee Summer League, Ultimate Frisbee (Men's and Women's), Volleyball, Water Polo (Men's and Women's), and Wrestling (Men's and Women's)

There is a medical service.

The Rocky Mountain Collegian is CSU's student-run daily newspaper, where students have complete control over editorial decisions. The paper was founded in 1891, and was a weekly publication by the 1930s. During the 1940s and 1950s, the paper earned disrepute in the local community for its unpopular support of women's rights and anti-racism stance. By the 1970s, the Collegian was consistently publishing daily. Editorial quality and financial support have varied over the years, at times rising among elite college newspapers and at others struggling to publish. During the 1990s, the paper was twice selected as one of the top 12 daily student papers in the country.In late 2007, the Collegian published a staff article that incited national debate about free speech. The article read, in its entirety, "Taser This...Fuck Bush." This event, as well as president Penley's considerations of "partnering" out the Collegian by Gannett in January 2008, lead to proposals in making CSU's student media, including the Rocky Mountain Collegian, a not-for-profit organization independent from the university. This resulted in the entirety of CSU Student Media to separate from the university to operate under an independent company, the Rocky Mountain Student Media Corporation.

KCSU is Colorado State's student run station, with a format focusing on alternative and college rock music, including indie rock, punk, hip-hop and electronic music. News, sports and weather updates along with talk programs and specialty shows round out the programming schedule. Broadcasting at 10,000 watts, KCSU is among the larger college stations in the country, reaching approximately 250,000 listeners. KCSU first began broadcasting in 1964 as a station owned, operated and financed by students. Following a long period as a professional station, KCSU again became student run in 1995, at which time the current format was adopted. As with the Collegian and CTV, KCSU was hit hard by the 1997 flood, and for a time was forced to broadcast from remote locations. Now back in its original Lory Student Center location, KCSU has benefited from revamped production facilities and updated equipment.

CTV is CSU's student-run television station, that allows students to hone their media skills- reporting, writing, producing, shooting, editing- in an educational environment. The station is a winner of fourteen Rocky Mountain Collegiate Media Association awards and a Student Emmy Award from the National Academy of Television Arts and Sciences Heartland Chapter. Content includes news shows on Tuesdays – Thursdays, a sports show on Mondays, and "The Colorado Music Lounge," a coproduction with KCSU that profiles local bands performing live, which airs weekly. CTV was founded in 1989, and currently broadcasts weeknights on the university cable station (Comcast channel 11) at 8pm, with reruns at 9am and 12 noon the next day.

Student-run magazine College Avenue was founded in 2005 with the goal, as put forth by its founding editors, of giving students a new forum to address controversial issues affecting the campus community from their own vantage point.Since its first issue in fall 2005, the magazine has been released quarterly in the past and is now released monthly. The most recent issue released was in November 2012. College Avenue has grown substantially from its beginnings in 2005. College Avenue has developed a fully functioning website, a mobile application, and a tablet application that is currently under construction. Despite the new web first attitude, College Avenue remains the sole platform for long form student journalism at Colorado State University.

Greek life

Greek life at Colorado State began in the fall of 1915. Currently 10% of undergraduates join one of CSUs 19 fraternities and 14 sororities. The CSU Inter-Fraternity Council acts as the governing body for the 19 fraternities, each with a delegate representative. Similarly, the CSU Panhellenic Council governs the sororities. CSU Greek organizations are involved in a number of philanthropic activities around campus, among them CSUnity, Cans around the Oval, Habitat for Humanity and RamRide. The governing bodies recently raised $25,000 towards the sponsorship of a Habitat for Humanity home.

From 1932 until 1949, Colorado State University was home to the Eta chapter of Phrateres, a philanthropic-social organization for female college students. Eta was the 7th chapter installed and Phrateres eventually had over 20 chapters in Canada and the United States. (The chapter name "Eta" was reused for the chapter installed at Arizona State University in 1958.)