US 18 traverses eastern Iowa, connecting major highways such as I-35 and I-380. It passes through the cities of Mason City, Charles City, and Dubuque.
US 18: RWIS – US 18 MM 257 @ Hawkeye: R70: Bridge Approach
US 18: RWIS – US 18 MM 257 @ Hawkeye: R70: Bridge View
US 18: RWIS – US 18 MM 257 @ Hawkeye: R70: East Zoom
US 18: RWIS – US 18 MM 257 @ Hawkeye: R70: North View
US 18: RWIS – US 18 MM 257 @ Hawkeye: R70: Northeast View
US 18: RWIS – US 18 MM 257 @ Hawkeye: R70: Road View
US 18: RWIS – US 18 MM 257 @ Hawkeye: R70: US18 Intersection
US 18: RWIS – US 18 MM 257 @ Hawkeye: R70: US18 West
US 18: RWIS – US 18 MM 224 @ New Hampton: R33: East View
US 18: RWIS – US 18 MM 224 @ New Hampton: R33: South View
US 18: RWIS – US 18 MM 224 @ New Hampton: R33: US 18 Bridge
US 18: RWIS – US 18 MM 224 @ New Hampton: R33: US 18 Road
US 18: RWIS – US 18 MM 224 @ New Hampton: R33: US 18 West View
US 18: RWIS – Thrush Ave SB at US 18 @ Mason City: R74: East View
US 18: RWIS – Thrush Ave SB at US 18 @ Mason City: R74: North View
US 18: RWIS – Thrush Ave SB at US 18 @ Mason City: R74: South View
US 18: RWIS – Thrush Ave SB at US 18 @ Mason City: R74: West View
US 18: RWIS – Thrush Ave SB at US 18 @ Mason City: R74 West Zoom View
US 18: RWIS – Thrush Ave SB at US 18 @ Mason City: R74: East Zoom View
US 18: D2 – US 18 @ MM 186.3 near Mason City (03)
US 18: WWD – US 18 @ Britt (TT01)
US 18: RWIS – US 18 MM 122 @ Algona: R1: West View
US 18: RWIS – US 18 MM 122 @ Algona: R1: US 18 Bridge Deck
US 18: RWIS – US 18 MM 122 @ Algona: R1: US 18 EB Approach
US 18: RWIS – US 18 MM 122 @ Algona: R1: US 18 WB Approach
US 18: RWIS – US 18 MM 85 @ Spencer: R42: US 18 Bridge
US 18: RWIS – US 18 MM 85 @ Spencer: R42: US 18 Road
US 18: RWIS – US 18 MM 85 @ Spencer: R42: US 18 East View
US 18: RWIS – US 18 MM 85 @ Spencer: R42: US 18 West View
