GOP Organizational Chart
The Fabulous 40th
Senate District of Georgia is a part of the DeKalb County GOP (DGOP) as well as other Senate Districts in DeKalb County, DeKalb Senior Republican Network, North DeKalb Republican Women (NDRW), Central DeKalb Republican Women (CDRW) & the DeKalb Young Republicans (DYR).
The DGOP is a part of the 6th (Congressional) District GOP (as well as the other 3 Counties in that District, which is a part of the Georgia State GOP (which has 159 Counties & 14 Congressional Districts). All the above is part of the RNC - the Republican National Committee (the National GOP organization).
Of interest, District of Columbia Republican Committee
is roughly the equivalent of a state-level party