Springfield is a city in Lane County, Oregon, United States. Located in the Southern Willamette Valley, it is within the Eugene-Springfield Metropolitan Statistical Area. Separated from Eugene to the west, mainly by Interstate 5, Springfield is the second-most populous city in the metropolitan area after Eugene. As of the 2010 census, the city has a total population of 59,403. The Briggs family first settled the Springfield area, arriving in 1848. The community was incorporated as a city in 1885. The city was named after a natural spring located in a field or prairie within the current city boundaries.