Do only US universities accept SAT scores?

No, the SAT is not accepted only by universities in the USA. Institutions in Canada, Italy, the UK, India, and Singapore also accept SAT scores for undergraduate admissions, so a good score can support applications well beyond the United States.

Countries that accept SAT scores

What this means for your applications

Since SAT acceptance varies by university even within these countries, always confirm the specific score requirement or cutoff for each program you are targeting rather than assuming a blanket policy. This is especially useful if you are keeping your study-abroad options open across multiple countries.

My Advice

I would check the admissions page of every shortlisted university, regardless of country, before assuming your SAT score is accepted or sufficient. Requirements differ enough between institutions that a quick check now can save you a rejected application later.