This is a non comprehensive list of stand alone mini conferences in political science and adjacent fields. I don't include pre-conferences or conferences-within-conferences attached to larger conferences.
I've organized them by subfield and provided a brief description when possible.
Politics of Race, Immigration, and Ethnicity Consortium (PRIEC). Series of mini-conferences held multiple times a year. Nationwide, but founded in Southern California.
Mid-American Conference for Race, Gender, Immigration and Ethnicity Politics (MARGIE). Yearly mini-conference primarily based in Middle America.
Symposium on the Politics of Immigration, Race, and Ethnicity (SPIRE). Yearly mini-conference primarily based in the East Coast.
Front Range Political Science Association. Yearly mini-conference primarily based in the Colorado Front Range.
Southern California Political Institutions and Political Economy Working Group. Series of mini-conferences held multiple times a year. Primarily based in Southern California.
Consortium on the American Political Economy (CAPE). Yearly mini-conference. Nationwide group.
Southern California Political Behavior Conference. Yearly mini-conference primarily based in Southern California.
Four Corners Political Psychology Conference. Yearly mini-conference primarily based in the Mountain West.
Polarization Research Lab Annual Meeting. Yearly mini-conference. Primarily US-focused, but increasingly comparative. Nationwide.
Four Corners Conflict Network (4CCN). Yearly conference on violent and nonviolent forms of political and social conflict. Primarily based in the four corner states: Arizona, Colorado, New Mexico, and Utah.
Carolinas Conflict Consortium. Yearly conference on peace and conflict research. Primarily based in North and South Carolina.
Working Group in African Political Economy (WGAPE).
Northeast Workshop in Empirical Political Science (NEWEPS). Series of mini-conferences held multiple times a year. Primarily based in the Northeast.
California-based Workshop on Empirical Political Science (CaliWEPS). Series of mini-conferences. Primarily based in California. Possibly defunct.
Southern Workshop in Empirical Political Science (SoWEPS). Yearly mini-conference primarily based in the South.