Apple has announced its financial results for its fiscal 2010 fourth quarter that ended Sept. 25. And the company reported record Mac, iPhone and iPad sales.

Apple posted record revenue of US$20.34 billion and a net quarterly profit of $4.31 billion, or $4.64 per diluted share. These results compare to revenue of $12.21 billion and net quarterly profit of $2.53 billion, or $2.77 per diluted share, in the year-ago quarter. Gross margin was 36.9% compared to 41.8% in the year-ago quarter. International sales accounted for 57 percent of the quarter’s revenue.

Apple sold 3.89 million Macs during the quarter, a 27% unit increase over the year-ago quarter. The company sold 14.1 million iPhones in the quarter, representing 91% unit growth over the year-ago quarter. Apple sold 9.05 million iPods during the quarter, representing an 11% unit decline from the year-ago quarter. The company also sold 4.19 million iPads during the quarter.

“We are blown away to report over $20 billion in revenue and over $4 billion in after-tax earnings—both all-time records for Apple,” says CEO Steve Jobs. “iPhone sales of 14.1 million were up 91 percent year-over-year, handily beating the 12.1 million phones RIM sold in their most recent quarter. We still have a few surprises left for the remainder of this calendar year.”

“We’re thrilled with the performance and strength of our business, generating almost $5.7 billion in cash flow from operations during the quarter,” adds Apple Chief Financial Officer Peter Oppenheimer. “Looking ahead to the first fiscal quarter of 2011, we expect revenue of about $23 billion and we expect diluted earnings per share of about $4.80.”