Greenville, OH: how dark is the sky here?

Greenville's sky measures suburban edge here. A noticeable glow near the horizon. Brighter stars and constellations are easy to pick out; the Milky Way is washed out. Greenville's sky is brighter than 35.4% of the 3,206 cities in this dataset.

This comes from a satellite measuring light radiating upward, not a person's eyes on the ground, so it isn't the same as a Bortle class, though the two track each other closely.

How far Greenville is from a meaningfully darker sky

The closest place in this dataset with a meaningfully darker sky is Trotwood, OH, roughly 27 miles away in a straight line, rated rural. Road distance will be more.

Trotwood, OH is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.

How Greenville compares nationally

Greenville, OH has a population of about 12,701, one of 3,206 US cities of 10,000 or more residents in this dataset. Greenville places 1,131 of 3,206 cities in this dataset's darkest-to-brightest order.