Dan J. Clemens (January 3, 1945 – July 22, 2019) was a Republican member of the Missouri State Senate.
He was born in Webster County, Missouri, and educated in the schools of Marshfield, where he was an active member of Future Farmers of America.
He was the owner and operator of a third-generation family farm where he raised row crops.
He attended the First Baptist Church, and served on the Soil and Water District Commission, the Agriculture Advisory Commission, and a farmer representative on the James River Partnership.
Due to Missouri term limit restrictions he was ineligible to run again in 2010.