| Public library | City | County | Librarians (FTE) |
|---|---|---|---|
| Lower Merion Library System | Ardmore | Montgomery | 34.78 |
| Chester County Library | Exton | Chester | 26.58 |
| Reading Public Library | Reading | Berks | 16.88 |
| Abington Township Public Library | Abington | Montgomery | 12.63 |
| Mt. Lebanon Public Library | Pittsburgh | Allegheny | 12.25 |
| Erie County Public Library | Erie | Erie | 12.19 |
| Free Library of Springfield Township | Wyndmoor | Montgomery | 11.85 |
| York County Library System - Admin Unit | York | York | 11.8 |
| Tredyffrin Public Library | Wayne | Chester | 8.64 |
| Cheltenham Township Library System | Glenside | Montgomery | 8.44 |
| Horsham Township Library | Horsham | Montgomery | 8 |
| Upper Dublin Public Library | Fort Washington | Montgomery | 7.87 |
| New Castle Public Library | New Castle | Lawrence | 7.5 |
| Manheim Township Public Library | Lancaster | Lancaster | 6.25 |
| Free Library of Northampton Township | Richboro | Bucks | 6.23 |
| Easttown Library | Berwyn | Chester | 6.14 |
| South Park Township Library | South Park | Allegheny | 5.9 |
| Peters Township Public Library | McMurray | Washington | 5.33 |
| Green Tree Public Library | Pittsburgh | Allegheny | 5.3 |
| Wilkinsburg Public Library | Wilkinsburg | Allegheny | 5 |
| Oakmont Carnegie Library | Oakmont | Allegheny | 4.8 |
| Upper Merion Township Library | King of Prussia | Montgomery | 4.38 |
| Community Library of the Shenango Valley | Sharon | Mercer | 4 |
| Hershey Public Library | Hershey | Dauphin | 4 |
| Oil Region Library Association | Oil City | Venango | 4 |
| Southampton Free Library | Southampton | Bucks | 3.98 |
| Ridley Township Public Library | Folsom | Delaware | 3.9 |
| Lansdowne Public Library | Lansdowne | Delaware | 3 |
| Columbia County Traveling Library Authority | Bloomsburg | Columbia | 2.78 |
| Green Free Library of Wellsboro | Wellsboro | Tioga | 2.75 |
| Kittanning Public Library | Kittanning | Armstrong | 2.5 |
| Sinking Spring Public Library | Sinking Spring | Berks | 2.25 |
| New Cumberland Public Library | New Cumberland | Cumberland | 2.1 |
| Dubois Public Library | Dubois | Clearfield | 2 |
| Guthrie Memorial Library - Hanover's Public Library | Hanover | York | 2 |
| Community Library of Castle Shannon | Castle Shannon | Allegheny | 1.95 |
| Somerset County Library | Somerset | Somerset | 1.81 |
| Hamburg Public Library | Hamburg | Berks | 1.75 |
| Jefferson Hills Public Library | Jefferson Hills | Allegheny | 1.75 |
| Uniontown Public Library | Uniontown | Fayette | 1.75 |
| Carnegie Free Library of Swissvale | Swissvale | Allegheny | 1.7 |
| Riegelsville Public Library | Riegelsville | Bucks | 1.43 |
| Ridley Park Public Library | Ridley Park | Delaware | 1.33 |
| Clairton Public Library | Clairton | Allegheny | 1 |
| Coraopolis Memorial Library | Coraopolis | Allegheny | 1 |
| Mary M Campbell Marcus Hook Public Library | Marcus Hook | Delaware | 1 |
| Middletown Public Library | Middletown | Dauphin | 1 |
| Bradford County Library | Troy | Bradford | 0.95 |
| Tinicum Memorial Public Library | Essington | Delaware | 0.95 |
| Mary Meuser Memorial Library | Easton | Northampton | 0.94 |
| Milton Public Library | Milton | Northumberland | 0.94 |
| South Fork Public Library | South Fork | Cambria | 0.94 |
| Mather Memorial Library | Ulster | Bradford | 0.9 |
| Marienville Area Library | Marienville | Forest | 0.89 |
| Carrolltown Public Library | Carrolltown | Cambria | 0.88 |
| Green Free Library of Canton | Canton | Bradford | 0.88 |
| Monroeton Public Library | Monroeton | Bradford | 0.88 |
| Nanty Glo Public Library | Nanty Glo | Cambria | 0.88 |
| Morrisville Free Library Association | Morrisville | Bucks | 0.75 |
| Marianna Community Public Library | Marianna | Washington | 0.7 |
| Gallitzin Public Library | Gallitzin | Cambria | 0.5 |
| Rochester Public Library | Rochester | Beaver | 0 |
| Sarah Stewart Bovard Memorial Library | Tionesta | Forest | 0 |
| Wilcox Public Library | Wilcox | Elk | 0 |
| Yeadon Public Library | Yeadon | Delaware | 0 |
Largest first by librarians (FTE), as each employer reports it to its federal registry.
Source: Institute of Museum and Library Services, Public Libraries Survey, Fiscal Year 2024. Data captured October 2, 2026.
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