The 1951 Argentine Primera División was the 60th season of top-flight football in Argentina. The season began on April 15 and ended on December 5. Lanús promoted to Primera División as champion of Primera B Banfield and Racing shared the 1st position at the end of the tournament so a two-game playoff match was held to decide a champion. Racing won the series winning their 12th league title (and third consecutive). On the other hand, Quilmes and Gimnasia y Esgrima (LP) were relegated.

League standings

Championship Playoff

After finishing 1st in the table (with no goal difference considered), both teams, Banfield and Racing had to play a two-legged series to decide a champion.

Match details

Top scorers