Mr. Pillsbury was elected a representative to the general court from ward five, in 1871 and 1872, and was appointed chairman of the committee on the apportionment of public taxes during the session of the legislature in 1872. For several years Mr. Pillsbury was a member of the city councils of Concord, and his intimate knowledge of public affairs led the people to twice elect him as mayor, a position the duties of which he discharged with that rare ability which had characterized all his other affairs; and it was during this time that he decided, after much consideration, and with deep reluctance, to leave Concord and move to Minneapolis, Minn., where he had already acquired large interests. When this resolution was made public, it drew forth strong and wide-spread protests from the citizens and neighbors whom he had served so long, for they felt the state could illy afford to lose such a man. But of this we will speak later. During his residence in Concord he was identified with all measures to promote the public good. Both by his business judgment and his ready purse did he aid the benevolent and religious organizations. He was actively engaged in establishing the Centennial Home of Concord, for the aged, making large contributions and serving at a trustee. He was also a generous giver to the Orphans' Home at Franklin, and was a trustee from the time of its foundation until he left the state. In 1876 he was appointed, by the city councils, chairman of a committee of three to appraise all the real estate of the city for taxation purposes. Several objects attest his generosity and public spirit, among which might be mentioned the gift to the city of the fine bell in the tower of the Board of Trade building, and the handsome organ in the First Baptist church,--a joint gift from himself and his son, Hon. Charles A. Pillsbury, of Minneapolis. He also made several large contributions towards building and endowing the academy at New London.