Pannonhalma (German: Martinsberg; Slovak: Rábsky Svätý Martin) is a town in Győr-Moson-Sopron County, western Hungary, with approximately 4,000 inhabitants.

Archduke Otto Habsburg's heart is kept at the Pannonhalma Archabbey, while his body was laid at the Capuchin Crypt in the old Imperial capital of Vienna.

The town, known as Győrszentmárton until 1965, is dominated by its most famous landmarks: the thousand-year-old Pannonhalma Archabbey and the Benedictine Secondary School, which are situated above the village, on Szent Marton Hill.

The area remained a moving frontier between the Ottoman Empire and the Habsburg monarchy for the following 140 years and the town suffered considerable damage during this time.

Some dozens of Jews were protected in the abbey when it was taken under control of the International Red Cross in October 1944, along with 3,000 other refugees, many of them children, thanks to the efforts of a Swiss national, Eduard Benedek Brunschweiler.

Tour buses normally stop at the car park near the modern reception centre towards the top of the hill, where there is good access for disabled visitors.

The Pannonhalma-Sokoró wine region consists of 630 hectares and the main white grape varieties grown here are Pinot gris, Chardonnay, Rhine and Italian Riesling, Királyleányka, and Traminer (Gewürztraminer).