Assyrian Americans carrying the Assyrian flag at the annual Assyrian New Year parade in Chicago
|Neo-Aramaic · English|
(majority: Syriac Christianity; minority: Protestantism)
The Assyrians are an indigenous ethnic group native to the historical region of Assyria that spans northern Iraq, southeastern Turkey, northwest Iran, and northeastern Syria),, ethnically, historically and linguistically distinct from neighboring Arab, Turkish, Iranian and Kurdish populations and whose native tongue is various dialects of Eastern Aramaic that is referred to commonly as Syriac. 
The 2000 U.S. Census counted 82,355 Assyrians/Chaldeans/Syriacs in the country, of whom most lived in Illinois. These 3 groups were listed as one category in the United States Census  However, the official Census numbers are said to be very under-reported. The actual Assyrian population of the United States is estimated to be more than 600,000 people (as of 2019).  The largest Assyrian/Chaldean diaspora is located in Metropolitan Detroit, with a figure of 100,000 as of 2007. High concentrations are also located in Chicago, Phoenix, San Jose, Modesto, San Diego, Los Angeles, and Turlock, among others.
The first large wave of Assyrian immigration to the United States was due to the Assyrian Genocide, which occurred 1914–1920.
Assyrians have been present in the United States since the late 19th century. The first recorded Assyrian in America was Zia Attala. He reportedly immigrated to Philadelphia in 1889 and found work in the hotel industry. Most early Assyrian immigrants, however, were young men sent by Western missionaries for religious training.
Following the turn of the century, Assyrian immigration to America mostly came to a halt due to the Immigration Act of 1924 which effectively cut off any legal immigration to the United States for Assyrians and other non Western European groups. The second large wave of immigration occurred in the 1960s and 70s, mainly from northern Iraq due to conflicts and persecution by the Baathist government of Iraq. Many Assyrians arrived during this period and took advantage of the ongoing White flight in Detroit.
As a result of the situation, Assyrians gained a monopoly over grocery stores and other small businesses, and in many cases used their finances and newfound wealth to benefit the Assyrian community there and take in Assyrian refugees from Iraq. More Assyrians arrived throughout the 80s and 90s for similar reasons, with newer residents moving out of Detroit into suburbs such as Royal Oak and Sterling Heights due to the Crack epidemic in Detroit, while others began to move to San Diego, establishing a new Assyrian community there.
Assyrian immigration to the cities in Michigan began in the early 20th century. The cities in the state include, but are not limited to, Detroit, Southfield, Sterling Heights, Oak Park, Troy, West Bloomfield, Commerce, Walled Lake, Rochester Hills, Farmington Hills, Ferndale, Warren, Bloomfield Hills and Ann Arbor. More and more Assyrians, as they establish themselves financially, quickly move out of Detroit and into the other locations, including San Diego and cities in Arizona.
Before the 1970s, Assyrians came to the United States in search of greater economic opportunities. After the 1970s, many Assyrians fled for political freedom, especially after the rise of Saddam Hussein and, after the Persian Gulf War. Some were drawn by the economic opportunities they had seen successfully affect their family members who had already immigrated.
Less stringent immigration laws during the 1960s and 1970s facilitated increasing numbers, with the 1970s seeing the highest number of Assyrians coming to the United States. In 1962, the number of Assyrian owned grocery stores was 120, but grew to 278 in 1972. The main cause of this were the 1967 Detroit riots, after which Jewish grocery store owners left the area and left the opportunity open for Assyrians to take over. Often these Jews sold their old stores to Assyrians.
Iraqi president Saddam Hussein donated hundreds of thousands of dollars to Chaldean Catholic churches in Detroit and received a key to the city in the 1980s on behalf of mayor Coleman Young, when the Baath regime was an ally of the United States government.
Mostly all new Assyrian Chaldean Catholic immigrants and low-income senior citizens tend to reside in Detroit, in the 7 Mile Road between Woodward Avenue and John R Street. This area was officially named Chaldean Town in 1999. There are eight Chaldean Catholic churches in Metropolitan Detroit, located in West Bloomfield, Troy (where there are two), Oak Park, Southfield, Warren, Sterling Heights and Detroit.
After World War II, several Assyrian men who had been educated in Iraq by American Jesuits traveled to the United States. They were to teach Arabic to U.S. officers at the Army Language School who were going to be stationed in the Middle East. The men started the San Diego-area Chaldean Catholic community. Yasmeen S. Hanoosh, author of The Politics of Minority Chaldeans Between Iraq and America, wrote that the Chaldean Catholic Church in San Diego "continued to grow in relative isolation from the family-chain-migration based communities in and around Michigan."
Rev. Peter Elia from Iran was the first priest of the Chaldean Catholic community in Chicago which originated in 1907. In 1912, the St. Ephrem Chaldean Parish of Chicago was formed by Rev. Warda Mirza, also from Iran. 
There are 22,671 living in California according to the 2000 United States Census.
There are 34,685 Assyrians living in Illinois according to the 2000 United States Census.
The U.S. federal government took the word Syrian to mean Arabs from the Syrian Arab Republic and not as one of the terms to identify the ethnically distinct Assyrians, although the terms Syrian and Syriac are strongly accepted by mainstream majority academic opinion to be etymologically, historically and ethnically derivative of the earlier term Assyrian, and historically meant Assyrian (see Etymology of Syria). In addition, the Syrian Arab Republic is home to many ethnicities, including Arabs, Assyrians, Armenians, Kurds, and Turcomans, and is thus not an exclusively Arab nation.
The Syriac Orthodox Church was previously known as the Syrian Orthodox Church until a Holy Synod in 2000 voted to change it to Syriac, thus distinguishing from the Arabs. Mor Cyril Aphrem Karim wrote a letter to the Syriacs in 2000 urging them to register in the census as Syriac with a C, and not Syrian with an N to distinguish the group. He also urged them not to register as the country of origin.
Chaldean refers to ethnic Assyrians who are (traditionally) Roman Catholic, having split from the Assyrian Church between the 17th and 19th centuries.
On the U.S. census, there is a section for the Assyrian/Chaldean/Syriacs, which is listed separately from Syrian, Syrian being a subcategory for Arab.