WASHINGTON — Newly disclosed budget documents for America’s intelligence agencies show how aggressively the United States is now conducting offensive cyberoperations against other nations, even as the Obama administration protests attacks on American computer networks by China, Iran and Russia.

The documents, obtained by The Washington Post from Edward J. Snowden, the former National Security Agency contractor, and described by the paper in its Saturday editions, indicate 231 such operations in 2011, a year after the first evidence emerged of an American- and Israeli-led cyberattack against Iran’s nuclear-enrichment center.

That number suggests that President Obama was not deterred by the disclosure of the Iranian operation, which became evident because of a technological error, and is pressing ahead on using cyberweapons against a variety of targets.

The Post did not publish the documents. Last week, it said it had withheld most of the 178 pages of documents at the request of government officials because of the sensitivities of the spying operations they describe.