The following is an incomplete list of county-maintained roads in Isanti County, Minnesota, United States.

The northern leg of the route begins in Walbo, at its intersection with Highway 95, heads north 6.5 miles (10.5 km) on Vernon Street Northwest, and terminates at its intersection with 389th Avenue Northwest (CR 3).

Originally not segmented, the portion of the southern leg along 333rd Avenue Northwest was designated as County Road 65, but when the bridge over the Rum River was decommissioned, CR 1 was segmented and re-routed, making use of the Rum River bridge servicing Highway 95.

County Road 4 heads south on Main Street for 1.2 miles (1.9 km), concurrently with State Highway 107 (MN 107), then heads east 1.6 miles (2.6 km) to the county line on 8th Street Southeast, which becomes 413th Avenue Northeast upon leaving Braham.

The road continues eastward as North Lake Drive (Chisago CR 2).

The 28 miles (45 km) route begins as a continuation of 140th Street (Sherburne CR 2), heads east on 313th Avenue Northwest, heads south on Dolphin Street, then east on 293rd Avenue Northwest, where for the rest of the route maintains concurrency with Inter-county H. The route briefly heads south on Palm Street Northwest (CR 10), heads east on 289th Avenue Northwest through Isanti, and continues east on 293rd Avenue Northeast to the county line.

The route continues eastward as Rush Point Drive (Chisago CR 7).

The road continues north as Helium Street Northwest (CR 57) and eventually as Highway 47.

The 21.5 miles (34.6 km) route begins as a continuation of 260th Avenue (Sherburne CR 4), heads east on 261st Avenue Northwest, and terminates at its intersection with Verdin Street Northwest (CR 10).

County Road 23 is a 8 miles (13 km) route serving Athens Township and Isanti.

County Road 24 is a 3.5 miles (5.6 km) route serving Stanchfield Township.

Originally, the county road began at the intersection of Main Street and 3rd Avenue Southwest, headed east on 3rd Avenue Southwest, headed north to Buchanan Street, headed concurrently east on 1st Avenue East with Highway 95, before continuing northward along the present routing; this longer routing was shortened to the current shorter routing upon completion and re-routing of the State Highway 65 (MN 65) expressway through Cambridge.

County Road 28 is a 2.5 miles (4.0 km) route serving Spencer Brook Township.

The southern segment, signed as County Road 36A, begins at its intersection with State Highway 95 (MN 95), heads north on Vickers Street Northeast, heads west on 333rd Avenue Northeast, and terminates at its intersection with MN 95.

Presumably as Mille Lacs County Road 13 becomes Isanti County Road 13 heading east, Inter-county Highway G begins when 381st Street Northwest (CR 13) becomes 381st Street Northwest (CR 3).