McMinnville is located at the confluence of the North and South Forks of the Yamhill River in the Willamette Valley. Part of the Portland metropolitan area, it lies 35 miles (56 km) southwest of Portland. The city is home to Linfield College and the Evergreen Aviation Museum.
As of the census of 2000, there were 26,499 people residing in the city, among 9,367 households and 6,463 families. The population density is 2,675.8 people per square mile (1,033.5/km²). There are 9,834 housing units at an average density of 993.0/sq mi (383.5/km²). The racial makeup of the city is 86.39% White, 1.39% Native American, 1.25% Asian, 0.68% Black or African American, and 0.18% Pacific Islander. 14.64% of the population are Hispanic or Latino of any race. 7.26% identify themselves as from other races, and 2.86% from two or more races.
There are 9,367 households out of which 35.4% have children under the age of 18 living with them, 53.5% are married couples living together, 10.8% have a female householder with no husband present, and 31.0% are non-families. 23.9% of all households are made up of individuals and 11.5% have someone living alone who is 65 years of age or older. The average household size is 2.66 and the average family size is 3.13.
In the city, the population is spread out with 26.3% under the age of 18, 14.7% from 18 to 24, 26.9% from 25 to 44, 17.9% from 45 to 64, and 14.3% who are 65 years of age or older. The median age is 32 years. For every 100 females there are 93.7 males. For every 100 females age 18 and over, there are 90.6 males.
The median income for a household in the city is $38,953, and the median income for a family is $44,013. Males have a median income of $33,517 versus $24,405 for females. The per capita income for the city is $17,085. 12.9% of the population and 8.2% of families are below the poverty line. Out of the total population, 14.0% of those under the age of 18 and 7.8% of those 65 and older are living below the poverty line.
McMinnville Municipal Airport is owned and operated by the City of McMinnville.
McMinnville is known among UFO researchers for photographs published on the front page of the June 9, 1950 edition of the city's newspaper, the News-Register (then known as the Telephone-Register), reportedly of an unidentified flying object seen almost a month earlier, May 11. The Oregonian published the photographs the next day, and within a month they were published in LIFE magazine. The photographs were taken on a farm near McMinnville by a farming couple, Mr. and Mrs. Paul Trent. Mrs. Trent was the first to see the object—it resembled a classic "flying saucer"—and she pointed it out to her husband, who obtained a camera from their farmhouse and took two photos before the "saucer" flew away. A debate has raged for decades between UFO researchers, who claim that the photos are genuine and are among the best ever taken of a UFO, and UFO skeptics/debunkers, who claim that the photos are a hoax. Both sides in the debate have hired photographic experts numerous times to do a professional analysis of the photos, but so far neither side has offered convincing evidence to prove their case. The Trents' background was also thoroughly checked, and to date no evidence has surfaced implicating them in a hoax. The whole sequence of events has led to a "UFO Festival" being held in McMinnville each year, which is the biggest such gathering in the Pacific Northwest, and second in the country only to Roswell, New Mexico's.
Turkey Rama is a three-day festival held in downtown McMinnville celebrating the on-going tradition of the turkey barbecue. The barbecue was started in 1938 by turkey farmers in Yamhill County, when the main source of wealth in the county was largely based on the booming turkey-farming industry. Now, commercial exhibitions have replaced the "turkey exhibitions", and so the turkey-judging competitions and turkey races have been eliminated in favor of more "turkey-friendly" rides, booths, and outdoor entertainment. They hold many events which include a lip-synching competition that is covered in the News Register and on the local news station.
Since the 1990s, the majority of the vineyards of the Willamette Valley American Viticultural Area (AVA) have centered around McMinnville, thus giving this city a claim to the title of the capital of Oregon's wine industry. In January 2005, a McMinnville AVA was established after an application from Youngberg Hill Vineyards. The AVA includes 14 wineries and 523 acres (2.12 km²) within the Willamette Valley AVA. The city is at the northeastern border of its AVA namesake.
The International Pinot Noir Celebration has been held every July since 1987 on the Linfield College campus.