Recorder Deeds has marriage records Clerk Circuit Court has divorce, court and land records Probate Judge has probate records
1849 McDonald County was created 3 March 1849 from Newton County. County seat: Pineville. 
For animated maps illustrating Missouri county boundary changes, "Rotating Formation Missouri County Boundary Maps" (1804-1889) may be viewed for free at the MapofUS.org website.
1856 Log courthouse was demolished. 1863 Courthouse burned, destroying most records. Deeds before 1863 were recreated. For suggestions about research in places that suffered historic record losses, see:
Burned Counties Research in the FamilySearch Research Wiki. Arlene Eakle, When the Records are Gone in the Tennessee Genealogy Blog. Michael John Neill, Burned Counties in Family History Circle.
Town/city records in the FamilySearch Catalog
Bethpage Goodman Noel Powell Prairie Township Rocky Comfort Southwest City The State Historical Society of Missouri has information on historical Missouri place names for all 114 Missouri Counties.
Barry • Benton County, Arkansas • Delaware County, Oklahoma • Newton • Ottawa County, Oklahoma