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Other County and Regional Planning District Information

Regional Planning Districts were created primarily for regional use by the Baltimore Metropolitan Council, as part of the cooperative forecasting effort.  They are used by the Howard County Department of Planning and Zoning for its Residential Construction and Population Report.

These two charts show the population and the number of households in each Regional Planning District in 2018.

These two charts show the area in square miles and population density per square mile in each Regional Planning District.

This chart shows the percentage of households in each income category for each Regional Planning District.

For example, 50% of the households in Clarksville had an annual income of more than $200,000 compared to fewer than 20% in Columbia, Elkridge, and Laurel.

These two charts show the growth of Howard County Regional Planning Districts since 1970.

Columbia grew rapidly in the 1970s and 1980s, and other Regional Planning Districts have grown more rapidly since then.   In 1970, Ellicott City had a larger population than any other Regional Planning District.  In 2018, Columbia had the largest population, even as its growth has slowed.  Between 1970 and 2018, the population of Howard County increased by a factor of more than five.