Overall PC shipments fell in the first quarter of 2011 in the United States, but Apple gained.

[ad#Google Adsense 300×250 in story]In fact, Apple’s market share gains were the highest among the top companies, according to a new report from market research firm, Gartner.

Apple shipped 1.25 million Macs in the first quarter of 2010 and 1.49 million in the first quarter of 2011. The company’s market share grew from 7.3 percent in 2010 to 9.3 percent in 2011.

Looking at market share growth, the only other company to show growth in the first quarter was Toshiba. It grew by 10.9 percent over the same time last year.

HP fell 3.5 percent, Dell fell 12.1 percent, and Acer fell 24.9 percent.