 {{infobox settlement | name = la union | other_name = | settlement_type = province | image_skyline = arch of la union.jpg | image_alt = | image_caption = welcome arch of la union at the la union-ilocos sur border | image_flag = vlag fil launion.gif | flag_size = 120x80px | image_seal = ph seal la union.png | seal_size = 100x80px | image_shield = | shield_alt = | nickname = | motto = | image_map = ph locator map la union.png | map_alt = | map_caption = map of the philippines with la union highlighted | latd = 16 |latm = 30 |latns = n | longd = 120 |longm = 25 |longew = e | coordinates_type = region:ph_type:adm1st_source:gns-enwiki | coordinates_display = inline,title | coordinates_footnotes = | subdivision_type = country | subdivision_name =  | subdivision_type1 = region | subdivision_name1 = region i | established_title = founded | established_date = march 2, 1850 | seat_type = capital | seat = san fernando city | leader_party = | leader_title = governor | leader_name = manuel "manoling" c. ortega (npc) | leader_title2 = vice governor | leader_name2 = aureo nisce (npc) | area_footnotes =  | area_total_km2 = 1497.70 | area_rank = 68th out of 80 | area_note = | population_footnotes =  | population_total = 741906 | population_as_of = 2010 | population_rank = 37th out of 80 | population_density_km2 = auto | population_density_rank = 10th out of 80 | population_note = | elevation_m = | demographics_type1 = divisions | demographics1_footnotes = <!-- for references: use tags --> | demographics1_title1 = independent&nbsp;cities | demographics1_info1 = 0 | demographics1_title2 = component cities | demographics1_info2 = 1 | demographics1_title3 = municipalities | demographics1_info3 = 19 | demographics1_title4 = barangays | demographics1_info4 = 576 | demographics1_title5 = [[house of represent
1850_establishments_in_the_Philippines Provinces_of_the_Philippines States_and_territories_established_in_1850