Dentists in Union County, OH

52 dental practices are listed across 2 towns in Union County, OH, from the federal National Provider Identifier register as it stood on 3 October 2026. The towns with the most are Marysville (50), Richwood (2).

Because insurance networks, Medicaid plans and health districts are drawn by county, and because the practice nearest you may be in the next town rather than your own. This page ignores the town boundary and lists the whole county in one order: the practices most likely to answer first, closest first inside each group.

Tick the practices you want on this page and send one request. The ones that have claimed a listing answer by email; the rest are told a patient is asking for them, and their own page carries the phone number. It is free and there is no account.