What is Chelsea, Massachusetts?
{{Infobox settlement |official_name = Chelsea, Massachusetts |nickname = |motto = |image_skyline = Tobin_bridge_crop.jpg |imagesize = |image_caption = The Tobin Bridge, linking Chelsea and Boston |image_seal = Seal of Chelsea, Massachusetts.png |image_flag = Flag of Chelsea, Massachusetts.gif |image_map = Suffolk County Massachusetts incorporated and unincorporated areas Chelsea highlighted.svg |map_caption = Location in [[Suffolk County, MA|Suffolk County]] and the state of [[Massachusetts]] |pushpin_map = USA |pushpin_map_caption = Location in the United States |subdivision_type = Country |subdivision_name = United States |subdivision_type1 = [[U.S. state|State]] |subdivision_name1 = [[Massachusetts]] |subdivision_type2 = [[List of counties in Massachusetts|County]] |subdivision_name2 = [[Suffolk County, Massachusetts|Suffolk]] |established_title = Settled |established_date = 1624 |established_title2 = Incorporated (town) |established_date2 = 1739 |established_title3 = Incorporated (city) |established_date3 = 1857 |government_type = [[Council-manager government|Council–manager]] |leader_title = [[City manager]] |leader_name = |area_magnitude = |area_total_km2 = 6.39 |area_total_sq_mi = 2.47 |area_land_km2 = 5.75 |area_land_sq_mi = 2.22 |area_water_km2 = 0.64 |area_water_sq_mi = 0.25 |population_as_of = [[2020 United States Census|2020]] |settlement_type = [[List of municipalities in Massachusetts|City]] |population_total = 40787 |population_density_km2 = 7097.87 |population_density_sq_mi = 18380.80 |elevation_m = 3 |elevation_ft = 10 |timezone = [[Eastern Standard Time Zone|Eastern]] |utc_offset