Last official estimated population of Slippery Rock borough (Butler County**, Pennsylvania state) was 3,576 (year 2014)[1]. This was 0.001% of total US population and 0.03% of total Pennsylvania state population. Area of Slippery Rock borough is 1.6 mi² (=4.3 km²)[6], in this year population density was 2,173.86 p/mi². If population growth rate would be same as in period 2010-2014 (-0.34%/yr), Slippery Rock borough population in 2026 would be 3,433*.
Historical population of Slippery Rock borough for period 1850-2014:
Estimated population for 2014[1]. Click on flag to hide it.
Population • Legends • Position
[1850-1860] +2.24 %/yr
[1860-1870] +0.53 %/yr
[1870-1880] +1.34 %/yr
[1880-1890] +0.7 %/yr
[1890-1900] +8.28 %/yr
[1900-1910] -1.31 %/yr
[1910-1920] -0.52 %/yr
[1920-1930] +3.5 %/yr
[1930-1940] +0.86 %/yr
[1940-1950] +6.1 %/yr
[1950-1960] +1.11 %/yr
[1960-1970] +6.8 %/yr
[1970-1980] -4.73 %/yr
[1980-1990] -0.24 %/yr
[1990-2000] +2.63 %/yr
[2000-2005] -0.65 %/yr
[2005-2010] -0.59 %/yr
[2010-2014] -0.34 %/yr
• Grove City borough population
6.3 mi, 
345°
• Prospect borough
11.8 mi, 
177°
• Harrisville borough
5.2 mi, 
27°
• Clintonville borough
13.2 mi, 
46°
• West Liberty borough
4.2 mi, 
186°
• Eau Claire borough
14.3 mi, 
70°
• Portersville borough
11 mi, 
204°
• Barkeyville borough
9.6 mi, 
24°
• West Sunbury borough
9.5 mi, 
117°
• Volant borough
10.9 mi, 
285°
*Calculated by population.us from last known population growth rate, not official data.
**Some cities are placed on more than one county. Only 1 county is shown.
[1] Cities and Towns (Incorporated Places and Minor Civil Divisions) 2014, archived from the original, retrieved 02/23/2016
[2] City and Town Intercensal Estimates (2000-2010), archived from the original, retrieved 02/23/2016
[3] Places: 1990 and 1999 Populations, With Numeric and Percent Population Change, archived from the original, retrieved 02/23/2016
[4] Population of the 100 Largest Urban Places: 1980,
[5] Population of the 100 Largest Urban Places in history,
[6] Area, latitude longitude data, retrieved 02/23/2016
[7] Through the Decades, Overview 1790-2010, PDF, large files! >100 Mb
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