Mokena () is a village in Will County, Illinois, United States. The population was 18,740 at the 2010 census. The Census Bureau's 2019 estimate found that the population had increased to 20,159.
Mokena is a name apparently derived from a Native American language meaning "turtle". While the particular language from which the name originates is not documented, likely candidates are Anishinaabemowin, whose word for "snapping turtle" is mikinaak, and its close sister language Potawatomi, in which the same animal is called mkenak. Both languages were once spoken in the area now occupied by the town.
Mokena is located at 41°32′4″N 87°52′37″W. According to the 2010 census, Mokena has an area of 8.893 square miles (23.03 km2), of which 8.89 square miles (23.02 km2) (or 99.97%) is land and 0.003 square miles (0.01 km2) (or 0.03%) is water.
Mokena is served by Lincoln-Way Community High School District 210; students attend Lincoln-Way Central High School. Elementary school services are provided by one of four school districts: Mokena School District 159, New Lenox School District 122, Frankfort School District 157C, and Summit Hill School District 161. Schools within District 159 include MES (Mokena Elementary School), MIS (Mokena Intermediate School), and MJHS (Mokena Junior High School). Higher education is provided through Joliet Junior College, the nation's first public community college, and through Rasmussen College.