College of Southern Idaho SAT Scores, ACT Scores, Acceptance Rate, and Admissions Requirements
Southern Idaho’s standout number is its 100% freshman retention rate, which suggests students who enroll are finding reasons to stay. Because it is test-optional and listed scholarships do not include SAT or ACT cutoffs, submit scores if they strengthen your profile, while keeping cost, fit, and program choice at the center.
⬡ LangSmith9ffa13ad-8e67-439b-a14b-7e6c2c241c5fData on this page is sourced from our college data partners and was last updated on July 9, 2026.
College of Southern Idaho facts and stats
College of Southern Idaho enrolls about 10,176 undergraduate students in an urban campus setting. Southern Idaho reports a 100% freshman retention rate, which is above the national average of roughly 70%. The student-to-faculty ratio is 25:1.
⬡ LangSmithd701be5e-2fca-45c2-be45-8f72ccc7474eTwin Falls, ID
Key College of Southern Idaho application dates
Key dates
Regular Decision
August 15
Early Action
Not offered
Early Decision
Not offered
Priority Deadline
—
Financial Aid Priority
March 1
Test dates
August 22, 2026
Registration deadline: August 7, 2026
September 12, 2026
Registration deadline: August 28, 2026
October 3, 2026
Registration deadline: September 18, 2026
September 19, 2026
Registration deadline: August 14, 2026
October 17, 2026
Registration deadline: September 11, 2026
December 12, 2026
Registration deadline: November 6, 2026
If you choose to submit SAT or ACT scores to test-optional Southern Idaho, take your first test by the spring of junior year, then use the summer before senior year for a retake if a higher score or superscore would help. Because Southern Idaho’s Regular Decision deadline is August 15, fall senior retakes will not arrive in time for that application.
⬡ LangSmith1f06c3fd-453c-46b5-958a-6b7f7206972cWant to improve your scores and unlock scholarships at College of Southern Idaho?
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What you'll actually pay
At Southern Idaho, in-state tuition is $5,700 and out-of-state tuition is $8,550. Submit the FAFSA by the March 1 priority deadline to be considered for financial aid.
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Southern Idaho’s out-of-state tuition is $8,550, compared with $5,700 for Idaho students. Room and board adds about $6,360, bringing billed costs to roughly $14,910 before books, fees, and personal expenses for out-of-state students. Actual costs can be lower depending on financial need, grants, scholarships, and other aid.
⬡ LangSmith5874371c-34b2-41e4-bb75-d33b38a03a09Student life at College of Southern Idaho
10% of undergrads live on campus
Freshman housing: No guarantee
No fraternity or sorority life on campus.
Similar schools
College of Eastern Idaho
Idaho Falls, IDAcceptance rate: 100%
North Idaho College
Coeur d'Alene, IDAcceptance rate: 84.5%
SAT: 880–1110
ACT: 19–25
Wenatchee Valley College
Wenatchee, WAAcceptance rate: 42.5%
Cochise College
Sierra Vista, AZAcceptance rate: 85.7%
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