The objective of this review was to revise the existing information regarding type 2 diabetes (T2D) prevalence in the Argentine population during the past 30 years and to see whether the available data and methodology of the studies conducted allow analysis of time trends. The PubMED and LILACS databases were searched using the search terms "diabetes prevalence" and "Argentina". A total of 301 studies were identified and 19 of them remained in the review after applying the inclusion and exclusion criteria. The studies reviewed covered a time period of 30 years (1979-2012). The studies conducted in Argentina during the last 30 years assessing the prevalence of T2D are very heterogeneous. The majority of the studies were conducted in the province of Buenos Aires. As the assessment of T2D varied between the studies in respect of diagnostic criteria and diagnostic tests for T2D, meaningful comparisons are difficult to make, not to mention an analysis of time trends. All in all, the T2D prevalence seems to be at least 10% in the Argentina population. However, the latest large population surveys conducted in Argentina is promising and may offer the most reliable estimates of the T2D prevalence even though the diagnosis of T2D was based on participant self-report. This article is protected by copyright. All rights reserved.