How many representatives were there in the house when it first convened in 1789?

Only thirteen members presented

The first session of the first House ofRepresentatives came to order in Federal Hall, New York City on March 4,1789, with only thirteen members present. The requisite quorum (thirty members out of fifty-nine) was not present until April 1, 1789. The first order of business was the election of a Speaker of the House.