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 the raising and spending of money for political campaigns. While not the only factor in an election’s outcome, successful fundraising can provide a candidate with advantages, such as the ability to boost name recognition and promote a message. In addition, fundraising can indicate enthusiasm for candidates and parties.