This article details the five most and least expensive contested primary elections in the State Senate. In the 2022 election cycle, nine of 37 Republican primaries and five of 29 Democratic primaries are contested.

Campaign finance requirements govern how much money candidates may receive from individuals and organizations, how often they must report those contributions, and how much individuals, organizations, and political entities may contribute to campaigns.

Campaign finance requirements govern how much money candidates may receive from individuals and organizations, how often they must report those contributions, and how much individuals, organizations, and political entities may contribute to campaigns.