There are stark contrasts in internet subscription rates depending on where you live and how much money you make, according to newly released findings from the U.S. Census Bureau.

As the cost of internet access continues to rise, affordability is increasingly a problem for poor Americans. In rural areas, a lack of broadband availability is also holding down subscription rates.

Telfair County, Ga. has the dubious distinction of being America’s worst connected county, with just 25% of households signed up for internet access. The most connected communities are found in suburban areas surrounding major cities along the Pacific Coast and northeastern U.S. More than 90% of households also have internet access in suburban areas outside of the District of Columbia, Atlanta, and Denver.

Urban Poor Americans Can’t Afford Increasingly Expensive Service Plans; Many Turn to Smartphones Instead

Although internet subscription rates are sky-high in wealthier suburban areas, poor inner city neighborhoods score poorly for internet subscriptions. In the Chicago metropolitan area, 77% of Cook County households subscribe to the internet. In downtown Los Angeles, just 80% are signed up. In D.C., only 78% subscribe.

In Philadelphia, there were some neighborhoods with just 25% of residents getting internet service. In the Tioga-Nicetown neighborhood, only 37.1% of households had internet service. Persistent poverty, crime, unemployment, and low-income in poorer parts of the inner city have conspired to make it very difficult for residents to afford internet access at prices often over $50 a month.

Increasingly, poor urban residents are turning to their smartphones as their sole source of internet. In the Philadelphia neighborhood of Fairhill, where internet subscriptions are below 38%, 12% of homes report smartphones are the only way they connect to the internet.

Some of the worst scoring counties where internet subscription rates were lower than average are located in rural areas across the upper Plains, the Southwest and South. The desert states of Arizona and New Mexico, south Texas, the lower Mississippi through Southern Alabama and some areas of the Piedmont of Georgia, the Carolinas and Southern Virginia were notable for containing many counties with low broadband internet subscription rates, although there were exceptions throughout.

Only 67% of Native Americans have signed up for internet access, compared with 82 percent for non-Native Americans. Native Americans living on American Indian land had a subscription rate of 53 percent.

Thirteen percent of the counties achieving better than an 80% subscription rate were located in “mostly rural” or “completely rural” counties, often getting telecommunications services from a local co-op or municipal utility. Assuming a rural customer can buy internet access, the next impediment is often cost.

In “mostly urban” counties with median household incomes of $50,000 and over, the average broadband internet subscription rate was roughly 80 percent, while in “completely rural” counties with the similar median incomes, the average broadband internet subscription rate was only 71 percent.

“Mostly urban” counties with median household incomes below $50,000, however, only reported average broadband internet subscription rates of 70 percent while “completely rural” counties with similar median incomes had average broadband internet subscription rates of just 62 percent.

This contrast showed up most dramatically in the South. Of the 21 counties with populations of at least 10,000 and broadband internet subscription rates at or above 90 percent, 12 were in the South, four were in the Midwest, four in the West, and one in the Northeast. Conversely, of the 24 counties with broadband internet subscription rates at or below 45 percent and populations of at least 10,000, 21 were in the South, two were in the West, and one was in the Midwest.