U.S. Federal Route 51 is a north-south highway in Eastern Ogle County. This runs along Interstate 39 through the entire county. U.S. Rt. 51 does not pass through any towns in Ogle County. U.S. Rt. 51 is multi-plexed in Ogle County. Interstate 39, through Ogle County.
NB I-39/U.S. Rt. 51 at the Lee/Ogle County Line. NB I-39/U.S. Rt. 51 at the Lee/Ogle County Line. NB I-39/U.S. Rt. 51 at I-88/IL St Rt 110. NB I-39/U.S. Rt. 51 at WB I-88/IL St Rt 110. A BGS on EB I-88/IL St Rt 110. A BGS on WB I-88/IL St Rt 110. SB I-39/U.S. Rt. 51 at EB I-88/IL St Rt 110. SB I-39/U.S. Rt. 51 at WB I-88/IL St Rt 110. SB I-39/U.S. Rt. 51 south of IL St Rt 38. NB I-39/US. Rt. 51 at IL St Rt 38. A junction marker on EB IL St Rt 38. A set of guide markers on WB IL St Rt 38. A BGS on WB IL St Rt 38. SB I-39/U.S. Rt. 51 at IL St Rt 38. NB I-39/U.S. Rt. 51 north of IL St Rt 38. NB I-39/U.S. Rt. 51 south of IL St Rt 64. SB I-39/U.S. Rt. 51 south of IL St Rt 72. SB I-39/U.S. Rt. 39 at the Ogle/Winnebago County Line.