What are you curious about, Columbus? If you've got a question about central Ohio, we'll do our best to look into the topic and let you know what we find! The longest street within the city limits of Columbus is the one you might expect: It's High Street, which runs north-south. At its southern end, it stretches 13.5 miles from just north of I-270 on the south side of the county to Cemetery Drive in the City of Worthington.