The Reagan administration official whose name will become a part of every American household was announced yesterday: Angela M. Buchanan, the nominee for treasurer of the United States.

You can look for that name on any U.S. currency printed after she takes office.

Buchanan, sister of Patrict Buchanan, a conservative columnist who used to write speeches for President Nixon, was treasurer of the Reagan campaign. She moves into a job traditionally held by a woman.

Also nominated yesterday:

Lionel H. Olmer, an official of Motorola Inc. who served on an intelligence advisory board during the Nixon and Ford administrations, as undersecretary of commerce for international trade.

John E. Chapoton, a Houston lawyer and former tax lawyer in the Treasury Department, as an assistant treasury secretary.

R. Tenney Johnson, a durable Washington official who served in six agencies and on the Civil Aeronautics Board in the Kennedy, Johnson, Nixon and Carter administrations, as general counsel for the Department of Energy.

T. Kenneth Cribb, Jr., a legal adviser during the campaign and transition, as assistant director of the office of Cabinet administration and staff assistant to the president.

Don Shasteen as deputy undersecretary of labor for legislation and intergovernmental relations.Shasteen is a former newsman, Capitol Hill aide and onetime U.S. Senate candidate from Nebraska who ran 470 miles across the state to dramatize his 1978 campaign.