Mierzeszyn
{{Infobox settlement
| name = Mierzeszyn
| settlement_type = Village
| total_type =
| image_skyline = Kościół parafialny p.w. Św. Bartłomieja w Mierzeszynie.jpg
| image_caption = Saint Bartholomew's Church in Mierzeszyn
| image_flag =
| image_shield = POL Mierzeszyn COA.svg
| image_map =
| subdivision_type = Country
| subdivision_name = {{POL}}
| subdivision_type1 = Voivodeship
| subdivision_name1 = Pomeranian
| subdivision_type2 = County
| subdivision_name2 = Gdańsk
| subdivision_type3 = Gmina
| subdivision_name3 = Trąbki Wielkie
| coordinates = {{coord|54|12|8|N|18|25|1|E|region:PL|display=title,inline}}
| pushpin_map = Poland
| pushpin_label_position = right
| timezone = CET
| utc_offset = +1
| timezone_DST = CEST
| utc_offset_DST = +2
| elevation_m =
| population_total = 800
| website =
}}
Mierzeszyn {{IPAc-pl|m|j|e|'|ż|e|sz|y|n}} is a village in the administrative district of Gmina Trąbki Wielkie, within Gdańsk County, Pomeranian Voivodeship, in northern Poland.{{TERYT}} It lies approximately {{convert|9|km|mi|0|abbr=on}} north-west of Trąbki Wielkie, {{convert|16|km|mi|0|abbr=on}} south-west of Pruszcz Gdański, and {{convert|24|km|mi|0|abbr=on}} south-west of the regional capital Gdańsk. It is located within the historic region of Pomerania.
Mierzeszyn was a royal village of the Polish Crown, administratively located in the Tczew County in the Pomeranian Voivodeship.Marian Biskup, Andrzej Tomczak, Mapy województwa pomorskiego w drugiej połowie XVI w., Toruń, 1955, p. 110, 112 (in Polish) In the past it was also called Miereszyn (1686), Miereszczyn (1717), and Mierzyszyn.Słownik geograficzny Królestwa Polskiego i innych krajów słowiańskich, Vol. VI, Warsaw, 1885, p. 359 (in Polish)
During the World War II, on November 17, 1939, the Germans murdered the local Polish priest in the nearby village of Nowy Wiec (see Intelligenzaktion).Maria Wardzyńska, Był rok 1939. Operacja niemieckiej policji bezpieczeństwa w Polsce. Intelligenzaktion, IPN, Warsaw, 2009, p. 155 (in Polish)
There are two historic churches in the village: the Saint Bartholomew's Church and the Church of the Sacred Heart of Jesus.