N.H. Rev. Stat. § 354-A:17
It shall be an unlawful discriminatory practice for any person, being the owner, lessee, proprietor, manager, superintendent, agent or employee of any place of public accommodation, because of the age, sex, gender identity, race, creed, color, marital status, physical or mental disability or national origin of any person, directly or indirectly, to refuse, withhold from or deny to such person any of the accommodations, advantages, facilities or privileges thereof; or, directly or indirectly, to publish, circulate, issue, display, post or mail any written or printed communication, notice or advertisement to the effect that any of the accommodations, advantages, facilities and privileges of any such place shall be refused, withheld from or denied to any person on account of age, sex, gender identity, race, creed, color, marital status, physical or mental disability or national origin; or that the patronage or custom thereat of any person belonging to or purporting to be of any particular age, sex, gender identity, race, creed, color, marital status, physical or mental disability or national origin is unwelcome, objectionable or acceptable, desired or solicited. In addition, no person shall be denied the benefit of the rights afforded by this section on account of that person's sexual orientation.
RSA 354-A:17
1992, 224:1. 1997, 108:15, eff. Jan. 1, 1998. 2018, 176:9, eff. July 8, 2018. 2019, 332:2, eff. Oct. 15, 2019.