THE BURNED OVER DISTRICT

At least some of the states are trying to assert that in new legislation that is being passed in states as different as Oklahoma and California.

Over two dozen privacy laws have passed this year in more than 10 states, in places as different as Oklahoma and California. Many lawmakers say that news reports of widespread surveillance by the National Security Agency have led to more support for the bills among constituents. And in some cases, the state lawmakers say, they have felt compelled to act because of the stalemate in Washington on legislation to strengthen privacy laws.

“Congress is obviously not interested in updating those things or protecting privacy,” said Jonathan Stickland, a Republican state representative in Texas. “If they’re not going to do it, states have to do it.”

For Internet companies, the patchwork of rules across the country means keeping a close eye on evolving laws to avoid overstepping. Many companies have an internal team to deal with state legislation. And the flurry of legislation has led some companies, particularly technology companies, to exert their lobbying muscles — with some success — when proposed measures stand to harm their bottom lines.

“It can be counterproductive to have multiple states addressing the same issue, especially with online privacy, which can be national or an international issue,” said Michael D. Hintze, chief privacy counsel at Microsoft, who added that at times it can create “burdensome compliance.” For companies, it helps that state measures are limited in their scope by a federal law that prevents states from interfering with interstate commerce.

This year, Texas passed a bill introduced by Mr. Stickland that requires warrants for email searches, while Oklahoma enacted a law meant to protect the privacy of student data. At least three states proposed measures to regulate who inherits digital data, including Facebook passwords, when a user dies.

This can create some problems in cross border traffic but that might just stimulate a national policy.