Tualatin (/tuˈɔːlətɪn/ ⓘ too-AW-lə-tin) is a city located primarily in Washington County in the U.S. state of Oregon.

A small portion of the city is also located in neighboring Clackamas County.

It is a southwestern suburb in the Portland Metropolitan Area that is located south of Tigard.

[7] In 1962, a fossilized Mastodon (Mammut americanum) was excavated in what later became a Fred Meyer parking lot.

[8] In 1972 fossils were uncovered near Fanno Creek that were determined to be a partial skeleton of a Harlan's Ground Sloth (Paramylodon harlani).

Built at the site of a former quarry, Bridgeport was designed to be reminiscent of an open-air European-style shopping experience.

There are many factories on the south side of town, including a large Lam Research plant that makes electrochemical deposition tools for manufacturing semiconductors.

[14] Knife manufacturers CRKT and KAI USA, which owns Kershaw and Zero Tolerance Knives, as well as Shun Cutlery[15] are located in Tualatin.

[16] Al Mar Knives is headquartered in Tualatin, although manufacturing is done in Japan.

Oregon Scientific, a manufacturer of consumer electronics products, is headquartered in Tualatin.

TriMet service includes WES Commuter Rail, at Tualatin Station, and bus lines 36, 37, 38, 76, 96, and 97.

[18] Despite being served by TriMet, Ride Connection also operates several fixed-route services within Tualatin.

The city of Tualatin falls incompletely under the jurisdiction of the Tigard-Tualatin School District.

A small section of the city is part of the West Linn-Wilsonville School District.

Students from Twality then split into either Tualatin or Tigard High School depending on zoning.