City size comparison

compared to

Rockville is about 3.4 times smaller than Dublin.

Dublin is approximately 118 sq km, while Rockville (map shows its 87 named neighbourhoods; the area covers the whole city) is approximately 35 sq km, making Rockville 29.83% the size of Dublin.
Tip: This to-scale comparison of Dublin vs. Rockville uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Rockville vs. Dublin

Flip Comparison · See true size
See Rockville on top of Dublin
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Cost of Living Comparison · 7 categories - 2026 data
Dublin is 9.8% more expensive than Rockville
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