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Immigration & Naturalization

Immigration

There were four basic periods of immigration to the US - before 1820, 1820-1880, 1880-1920, and 1920-1960.

Before 1820
1820-1880
1880-1920
1920-1960

Popular ports of arrival include New York, Boston, Baltimore, Philadelphia, Baltimore, Miami, New Orleans, Galveston, and San Francisco.

Of course, not everyone arrived by ship. Some came through Canada through border crossing stations, which were scattered between Buffalo and Seattle. Some came through Mexico.

The major international departure ports were Antwerp (Belgium), Liverpool (England), La Havre (France), Bremen (Germany), Hamburg (Germany), Genoa (Italy), Naples (Italy). They may have traveled from their home country to depart from a port in another country.

Sometimes one member of a family to come to the US first and sent for the rest of the family after getting established. Or, they may have made a trip back to home country and stayed for months or years before returning to US. In this case, there may be records for multiple arrivals at different ports of entry.

Work from what you know, or think you know, about your ancestor, their name, country of birth, date of birth, age, and with whom may have traveled. Census records, naturalization records, a biographical sketch, an obituary, passports, family sources, and other US or international records may help you narrow down when they arrived in the US. It is valuable to have an arrival timeframe because the states managed immigrants and kept the early records. After 1891, the federal government took over the process and records. It was common for multiple people to have the same name. You can use what you know to confirm or rule out results as you search online passenger and immigration records for your ancestor.

Naturalization

When you're checking for naturalization records, make sure that you check with the courts in all locations where your ancestor lived during his or her lifetime. Early on, say before 1880, to be naturalized, the person went to a Federal Court. Sometime after 1900, a person no longer had to go to a Federal Courthouse to be naturalized; the local county courthouse was the place to go. So, these are other places to check.

Many times minor children were naturalized with their parents and there are no separate records for them. And, in the earliest years, women did not have naturalization records. For some time, anyone who entered the U.S. under the age of 21 years was eligible to receive his Naturalization on the same day he applied for citizenship.

The naturalization process took several years, because:

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Page content reviewed and/or updated by the Advisory Board 2025 Oct


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