Armenian immigrants : Boston 1891-1901, New York 1880-1897 FamilySearch Library
Book Indexes to Boston Passenger Lists, 1899-1940 Ancestry 
Boston Passenger Lists, 1820-1943 Ancestry
Boston Steamship Arrivals, 1890-1930 (names of ships only) Ancestry
Boston's immigrants, 1790-1865 : a study in acculturation LDS Genealogy
Boston's immigrants, 1790-1865 : a study in acculturation Internet Archive
Boston, 1821-1850 Passenger and Immigration Lists Ancestry
Boston, Massachusetts Passenger Lists, 1884 Ancestry
Boston, Massachusetts Passenger Lists, 1891-1943 MyHeritage
Boston, Massachusetts, Passenger Lists, 1820-1891 MyHeritage
Dutch Immigrants to America, 1820-1880 (includes Boston passenger lists) Ancestry
Immigrant Arrivals in Boston (various passenger lists for 1634-6, 1716, 1764, 1766-7, 1825-8, 1846-7, 1858, 1882, 1903) Immigrant Ships Transcribers Guild
Immigrant Arrivals in Boston (various passenger lists for 1635, 1700, 1826, 1846-7, 1862, 1886, 1889, 1893, 1909) Immigrant Ships Transcribers Guild
Immigrant Arrivals in Boston (various passenger lists for 1638, 1826-8, 1846-9, 1854-6, 1886, 1894, 1896, 1905) Immigrant Ships Transcribers Guild
Immigrant Arrivals in Boston (various passenger lists for 1683, 1826, 1844, 1846, 1848, 1849, 1852, 1882-4, 1886, 1890, 1894, 1920) Immigrant Ships Transcribers Guild
Immigrant Arrivals in Boston (various passenger lists for 1826, 1862, 1874, 1881, 1887, 1890-1, 1905) Immigrant Ships Transcribers Guild
Immigrant Arrivals in Boston (various passenger lists for 1847, 1890, 1913, 1920, 1923) Immigrant Ships Transcribers Guild
Indexes to records of naturalization in New England courts, 1787-1905, United States Immigration and Naturalization Service Boston District Office Archive Grid
Lists of Alien Passengers to the Port of Boston, 1847-1852 American Ancestors
Massachusetts, Boston Crew Lists, 1917-1943 Family Search
Massachusetts, Boston Passenger Lists Index, 1899-1940 Family Search
Massachusetts, Boston Passenger Lists, 1820-1891 Family Search
Massachusetts, Boston Passenger Lists, 1891-1943 Family Search
Massachusetts, Index to Boston Passenger Lists, 1848-1891 Family Search
Massachusetts, Index to Passenger Lists of Vessels Arriving at Boston, 1921-1949 Family Search
Morton Allan Directory of European Passenger Steamship Arrivals, For the Years 1890 to 1930 at the Port of New York, and for the Years 1904 to 1926 at the Ports of New York, Philadelphia, Boston and Baltimore (included in My GPC Library subscription) Genealogical.com
Naturalization records (Boston, Massachusetts), 1845-1911 : NARA, RG 21 FamilySearch Library
Passenger Manifest for Boston (1848-1891) Massachusetts State Archives
Passenger lists of vessels arriving at Boston, 1820-1891 ; with index, 1848-1891 FamilySearch Library
Passenger lists of vessels arriving at Boston, Aug. 1, 1891-1943 ; Book indexes to Boston passenger lists, 1899-1940 ; Index to passenger lists of vessels arriving at Boston, Jan. 1, 1902- Dec.31, 1920 FamilySearch Library
Petitions and records of naturalization, 1790-1868, United States District Court (Massachusetts) Archive Grid
Petitions and records of naturalization, 1845-1864, United States Circuit Court (Massachusetts) Archive Grid
Petitions and records of naturalization, 1864-1906, United States Circuit Court (Massachusetts) Archive Grid
Petitions and records of naturalization, 1868-1906, United States District Court (Massachusetts) Archive Grid
Port Arrivals and Immigrants to the City of Boston, 1715-1716 and 1762-1769 (included in My GPC Library subscription) Genealogical.com
Records of naturalization in New England courts, 1787-1905, United States Immigration and Naturalization Service Boston District Office Archive Grid
Shawmut, or, the settlement of Boston by the Puritan pilgrims Ancestry
Ship registers and enrollments of Boston and Charlestown LDS Genealogy
Ship registers and enrollments of Boston and Charlestown Internet Archive
U.S., Atlantic Ports Passenger Lists (includes Boston 1820-1827, 1911 ) Ancestry