Lacey is a city in Thurston County, Washington. Established as a suburb of Olympia, Lacey's population as of the 2000 census was 31,226, as compared to 42,514 for Olympia. This makes Lacey less of an Olympia suburb and more of a city in its own right, although the city lacks a cohesive downtown area. Thurston County, which includes the cities of Lacey, Olympia and Tumwater, has a population of 207,355 as of the 2000 census. Lacey apartments for rent comparison page shows most up to date rent information on Lacey apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.