Yelm is a city in Thurston County, Washington, United States. Yelm ranked 10th of 279 eligible incorporated communities in the state of Washington for population growth between 2000 and 2010. To a large extent, Yelm acts as a bedroom community for residents working in the surrounding cities of Tacoma, Olympia, and Centralia. Yelm also hosts a large number of military families who are currently or were formerly stationed at nearby Joint Base Lewis-McChord. Yelm Middle School and Ridgeline are the middle schools in the Yelm School District.
The Yelm City Park was donated by Chuck and Wilma Demich, in 1950. Located at the corner of SR 507 and Mossman Avenue, the park is approximately one city block in size. It has a kitchen, covered facilities, a playground area, skateboard park, picnic tables, public restrooms, and a softball backstop. A number of community events are held at the Yelm City Park each year, including Prairie Days, Christmas in the Park, Family Fun Day, an annual car show, the Yelm Lions Easter Egg Hunt, and more. Yelm is home of the first Class A Water Reclamation Facility and distribution system in Washington. This system reclaims all of its wastewater, using it in local irrigation and added to recharge streams. The water also is used in Cochrane Park, a 8-acre wetland park that includes a catch-and-release pond for rainbow trout.
The median income for a household in the city was $39,453, and the median income for a family was $45,475. Males had a median income of $32,037 versus $24,474 for females. The per capita income for the city was $15,865. About 7.9% of families and 10.1% of the population were below the poverty line, including 11.3% of those under age 18 and 6.8% of those age 65 or over.