Dublin is a town located in Cheshire County within the state of New Hampshire, United States. Situated in a region characterized by hills and valleys, the northern slopes of Mount Monadnock occupy its southern portion. The terrain features hard, rocky soil that historically supported agriculture, while the town itself lies at the intersection of two major watersheds. Roughly the western half drains into the Connecticut River via Ashuelot River tributaries, whereas the eastern half flows into the Merrimack River through Contoocook River tributaries.

The area was originally granted in 1749 by the Masonian proprietors to Matthew Thornton and thirty-nine others as Monadnock No. 3, though permanent settlement was delayed by the French and Indian War until the 1760s. Irishman Henry Strongman was among the first settlers, leading Governor John Wentworth to incorporate the town in 1771 and name it after his birthplace, Dublin, Ireland. The community grew from a small mill town to a distinct municipality, with Harrisville separating in 1870.

The town's landscape includes Monadnock Lake, now known as Dublin Pond, alongside Farnum and Wight Ponds. Its architecture reflects the Federal style, notably influenced by carpenter Rufus Piper who added decorative fans to homes. A significant historical landmark is the Dublin Inn, purchased by the Baháʼí community for preservation after ʻAbdu’l‑Bahá stayed there during his 1912 visit. The area also hosts the Walden School summer music camp on the campus of Dublin School.

Cultural life includes the annual Dublin Gas Engine Meet on Cricket Hill Farm and Halloween events throughout October. The town is home to Yankee Publishing Inc., publisher of Yankee magazine, and was a summer residence for writer Mark Twain. Educational institutions include the coeducational private boarding school Dublin School, founded in 1935, and Dublin Christian Academy. The historic visit by ʻAbdu’l‑Bahá remains commemorated annually by the local community church.

The population was 1,532 at the 2020 census, down from earlier peaks in the nineteenth century. The economy benefits from publishing and tourism drawn to Mount Monadnock and Dublin Pond. Transport access is provided by New Hampshire Route 101 and Route 137, connecting the town to Peterborough, Marlborough, Keene, Hancock, and Jaffrey. The climate supports year-round outdoor activities, with the mountain summit offering visible reflections on the pond's surface.