On November 11, 1788, the New Hampshire House of Representatives selected John Langdon to be Senator by a vote of 60-3. The next day, the Senate confirmed him.
On November 12, 1788, the New Hampshire House of Representatives selected Nathaniel Peabody to be the other Senator by a vote of 40-36. That same day, the Senate rejected him 2-8.
On November 12, 1788, the New Hampshire Senate selected Josiah Bartlett to be the other senator. The House confirmed him by a vote of 61-16. Barlett declined the nomination.
On January 1, 1789, the New Hampshire selected Paine Wingate to be the other senator by a vote of 58-26. The Senate confirmed him on January 3.