Is the United States still under Lincoln's martial law?

Some believe Abraham Lincoln's martial law from the American Civil War is still in effect.

Hostilities technically ended about a month after Lincoln's assassination, with a proclamation made by new President Johnson on May 10, 1865.

armed resistance to the authority of this Government in the said insurrectionary States may be regarded as virtually at an end

On April 2, 1866, another proclamation declared the insurrection at an end in all States but Texas.

there now exists no organized armed resistance of misguided citizens or others to the authority of the United States in the States of Georgia, South Carolina, Virginia, North Carolina, Tennessee, Alabama, Louisiana, Arkansas, Mississippi, and Florida, and the laws can be sustained and enforced therein by the proper civil authority

On Aug 20, 1866, a third proclamation confirmed that civil government was officially resumed in all states that had seceded from the Union.

I do further proclaim that the said insurrection is at an end and that peace, order, tranquillity, and civil authority now exist in and throughout the whole of the United States of America.

Ergo, Lincoln's martial law can confidently be said to be no longer in effect.

Sources: Bartleby, The American Presidency Project