St. Anne's Park (Irish: Páirc Naomh Anna) is a public recreational facility, shared between Raheny and Clontarf, both suburbs on the northside of Dublin, Ireland. The Park, the second largest municipal park in Dublin, is part of a former 500 acre (2 km²) estate owned by Arthur Guinness and Benjamin Lee Guinness. The largest municipal park is nearby (North) Bull Island, also shared between Clontarf and Raheny.

The estate, which began in 1835, was named after the Holy Well of the same name on the lands. Lands were purchased over time to build up an extensive property, and a large mansion house was commissioned. Sir Arthur Edward Guinness (Lord Ardilaun) was the person most responsible for expanding and developing the estate and gardens and planted wind-breaking evergreen (holm) oaks and pines along the main avenue and estate boundaries, where they remain.

Lord and Lady Ardilaun had no children and the estate passed to their nephew Bishop Plunkett in the 1920s. In 1937, he decided he could no longer maintain such a large estate and negotiations with Dublin Corporation resulted in the house and 444.75 acres (1.80 km²) of estate being sold to the Corporation for approximately £55,000 in 1939. Bishop Plunkett retained Sybil Hill (now St. Paul's College) as a private residence with 30 acres (120,000 m²) of parkland, and it later became the site of St. Paul's College, Raheny, with extensive private playing fields. In December 1943, the main residence of St. Anne's, "The Mansion", was gutted by a fire while being used as a store by the Local Defence Force and the ruins were demolished in 1968. In the meantime, just over 200 acres (0.8 km²) of the estate were developed for public housing with the central and most attractive portion comprising about 240 acres (1.0 km²) retained as parkland and playing fields.

he park has a number of features, from the small Naniken River to two lakes (the New Lake and the Duck Pond), a number of follies including a viewing tower, a rockery, grand avenue, walled garden, a famous Rose Garden and newer miniature rose garden, and Dublin's arboretum, with 1,000 varied trees.

The elaborate Tudor redbrick Ardilaun stables survive, and have been modernised as the Red Stables Art Centre. Most of the follies also survive, though many have been damaged, and the seaside viewing tower has been closed for many years. The walled garden, including a fruit garden added to the estate by Bishop Plunkett, is now chiefly a 12 acre (49,000 m²) plant nursery for the Parks Department. Thousands of bedding plants, shrubs, trees, and floral tubs are produced annually in the nursery. There is a garden area open during limited hours, and a fine clock tower, restored to working order in 2007. In 1975, St. Anne's Rose Garden was opened to the public. In 1980 it was given a Civic Award by Bord Failte and the Irish Town Planning Institute and since 1981 it has been a centre for International Rose Trials.

The park is intensively used by the public through its 35 playing pitches, 18 hard-surfaced tennis courts, Duck Pond, and a par-3 golf course. Woodland paths add to the charm of the park as does a sunken garden constructed in the early 1970s.