They would have four children: Edward Hallock; Raymond DeLancy; Elizabeth M., Mrs. Charles D. Shrady; and Van Wagenen, father of actress Olive Hasbrouck.

For the next three years, he clerked for the courts and the territorial superintendent of Indian affairs, worked as a gauger for the internal revenue service, and studied law.

Hasbrouck won the 1885 Boise mayoral election as a Democrat, but resigned four months into his term, when he moved his business to Middleton, and thereafter to Weiser.

In 1889, territorial chief justice James H. Beatty appointed Hasbrouck as clerk of the local district court.

When the state supreme court was formed in 1890, it selected Hasbrouck as its clerk, a position he maintained until his death at his home in Boise on September 7, 1906.