Henniker is a city located in Merrimack County New Hampshire. Henniker has a 2020 population of 1,756. Henniker is currently declining at a rate of 0.00% annually and its population has increased by 0.52% since the most recent census, which recorded a population of 1,747 in 2010. Henniker reached it's highest population of in .
The average household income in Henniker is $78,221 with a poverty rate of 21.39%. The median rental costs in recent years comes to $770 per month, and the median house value is $245,200. The median age in Henniker is 22.7 years, 25.2 years for males, and 22 years for females.