Not always. If you’re a student or early-career applicant with limited work experience, one page is usually enough and easier for a recruiter to scan quickly. If you have more relevant experience — internships, research, leadership roles — a second page is fine, as long as everything on it earns its place.
The real test isn’t the page count, it’s relevance. A tight one-page CV beats a padded two-page one every time.
Quick answer: One page if you’re a student with limited experience. Two pages is acceptable once you have enough relevant content to fill it.