What can I find in county courthouse records?
Where the proof actually lives
For ancestors who lived before statewide vital registration, the county courthouse is usually where relationships get proven. Censuses suggest a family's shape; courthouse records state it outright, often under oath. Three record groups do most of the work.
Probate: the family named on paper
When a person died owning property, the county opened a probate file. A will may name a spouse, children (sometimes in birth order), sons-in-law, and grandchildren, in the deceased's own words. When there was no will, the intestate file can be even better: the law required identifying every legal heir, so administrators' records, guardianship appointments for minor children, and final distributions collectively list the family with a completeness few other records match. Always ask for the entire file, not just the will — the receipts and distributions at the back are where married daughters' new surnames appear.
Deeds: more than property
Deed books record land transfers, but read closely they record relationships. A deed of gift "for love and affection" to a named son; a group of grantors selling inherited land together, effectively listing the heirs; a wife's release of dower naming her; land sold "being the tract formerly of" a father — each of these is a genealogical statement embedded in a property record. If your family first acquired its land from the federal government, start with the BLM's General Land Office database to find the original patent, then follow the parcel forward through the county's grantor and grantee indexes.
Court minutes and the small records
County court minutes catch ancestors serving on juries, maintaining roads, posting marriage bonds, being appointed guardians, and litigating with their relatives. Tax lists, taken annually in many counties, fill the gaps between censuses and can show the year a young man came of age or an old man died. None of these records was created with genealogy in mind, which is exactly why they are trustworthy.
Working a courthouse (or its microfilm)
Practical points that save trips and money:
- Learn the county's boundary history first. County lines moved constantly; the records you need may sit in a parent county's courthouse. The FamilySearch Research Wiki documents each county's formation and parent counties, and much county material has been microfilmed or digitized so you can search before you travel.
- Ask what survived. Courthouse fires are a genuine, recurring problem in American research. When a county's records burned, the wiki's county page typically says so and lists what survives elsewhere — state copies, church records, and neighboring counties' files become your substitutes.
- Use the indexes, then distrust them. Old indexes group entries by first letter only and miss variant spellings; when a search matters, read the volume.
The Library of Congress local history and genealogy guides offer state-by-state orientation to what county records exist and where they have been deposited. Pair what you find with vital records where they exist, and remember to capture a full citation — county, record book, volume, page — for every entry, as our organization guide describes.