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JOSEPH T SIMPSON PUBLIC LIBRARY

EIN 23-1652343 MECHANICSBURG, PA

Browse the largest nonprofits in Pennsylvania

Revenue 2025
$1,980,220
Expenses 2025
$1,290,359

Program services were 81.0% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.

As filed

Subsection
03
Classification
2000
Street
16 N WALNUT ST

These codes are the IRS's own and are shown exactly as filed. What each one means is in the Business Master File documentation (opens in a new tab).

Other organizations at this address

1 other organization in the IRS Business Master File lists the same street address. matched by us

We match the street line and ZIP code as the IRS gives them, ignoring case and outer spaces and nothing else, so "AVE" and "AVENUE" count as different streets and this list can miss some. A shared address can mean related organizations or a shared office, but it can also be a registered agent, a mail drop or a service provider holding mail for unrelated clients. It is not, by itself, evidence that two organizations are connected.

Mission and programs · 2025

Mission

THE JOSEPH T. SIMPSON LIBRARY IS THE COMMUNITY'S LIBRARY, RESPONSIVE TO NEEDS AND DESIRES FOR KNOWLEDGE, UNDERSTANDING, ENRICHMENT, ENTERTAINMENT, AND CONNECTION.

  • SERVING A RAPIDLY GROWING COMMUNITY IN SOUTHCENTRAL PENNSYLVANIA, THE JOSEPH T. SIMPSON PUBLIC LIBRARY SERVES AS A VITAL COMMUNITY RESOURCE FOR LEARNING AND LEISURE. BY PROVIDING ACCESS TO AN ARRAY OF TRADITIONAL AND INNOVATIVE PUBLIC LIBRARY SERVICES, SIMPSON LIBRARY IMPROVES THE QUALITY OF LIFE FOR OVER 156,000 VISITORS EACH YEAR. IN 2025, SIMPSON LIBRARY CIRCULATED 588,873 ITEMS TO LIBRARY CARDHOLDERS AND PRESENTED 2,722 PROGRAMS FOR ALL AGES WITH MORE THAN 44,000 PEOPLE IN ATTENDANCE.

    Expenses $1,044,737 · Revenue $48,666

As filed on the 2025 return.

Officers and directors · 2025

As listed in Part VII of the 2025 return, in the order the filer printed them. Each return names its own; this is not a roster the organization keeps with us.

  • Sue Erdman

    EXECUTIVE DIRECTOR (UNTIL 02/2026)

    Total calculated
    $106,240
    From this org
    $82,740
    From related orgs
    $0
    Other
    $23,500
    Hours/week
    37.5
  • Arn Howald

    ASSISTANT DIRECTOR/PUBLIC SERVICES

    Total calculated
    $54,438
    From this org
    $54,438
    From related orgs
    $0
    Other
    $0
    Hours/week
    37.5
  • Elizabeth Seidel

    EXECUTIVE DIRECTOR (AS OF 11/2025)

    Total calculated
    $8,438
    From this org
    $8,438
    From related orgs
    $0
    Other
    $0
    Hours/week
    37.5
  • Thomas Topolski

    PRESIDENT

    Total calculated
    $0
    Hours/week
    3
  • G Edward Blum

    VICE PRESIDENT

    Total calculated
    $0
    Hours/week
    3
  • Sandra McIntyre

    SECRETARY

    Total calculated
    $0
    Hours/week
    3
  • Patricia Leib

    TREASURER

    Total calculated
    $0
    Hours/week
    3
  • Belinda Lawrence

    ASSISTANT TREASURER

    Total calculated
    $0
    Hours/week
    3
  • David Carll

    TRUSTEE

    Total calculated
    $0
    Hours/week
    3
  • Karen Cochran

    TRUSTEE

    Total calculated
    $0
    Hours/week
    3
  • Heather Knisley

    TRUSTEE

    Total calculated
    $0
    Hours/week
    3
  • Rob Moran

    TRUSTEE

    Total calculated
    $0
    Hours/week
    3
  • Corrin Ruggiero

    TRUSTEE

    Total calculated
    $0
    Hours/week
    3
  • Dwight Utz

    TRUSTEE

    Total calculated
    $0
    Hours/week
    3

Compensation is as filed in Part VII: reportable pay from this organization and from related organizations, other compensation, and hours per week. The total, marked calculated, is our sum of the three dollar columns, with a blank column counted as $0; the form itself has no total. On a Form 990-EZ the columns are Part IV's instead, and on a Form 990-PF Part VIII's — compensation, contributions to benefit plans, and expense account — and the total sums those. Earlier years are each on their own filing page.

Filings

  • 2025
    Revenue
    $1,980,220
    Expenses
    $1,290,359
    Contributions
    $1,908,188
    Grants paid
    $0
  • 2024
    Revenue
    $1,335,668
    Expenses
    $1,121,041
    Contributions
    $1,626,064
    Grants paid
    $0
  • 2023
    Revenue
    $1,972,277
    Expenses
    $1,067,232
    Contributions
    $1,976,502
    Grants paid
    $0
  • 2022
    Revenue
    $1,204,588
    Expenses
    $1,038,673
    Contributions
    $1,213,427
    Grants paid
    $0

The four totals the IRS asks for on Part I of the Form 990, as filed. A dash means the figure was not present on the return — not that it was zero.

Other returns filed

  • 2021 · 990

    Revenue
    $1,110,471
    Expenses
    $886,701
    Assets (EOY)
    $5,642,803
  • 2020 · 990

    Revenue
    $1,190,108
    Expenses
    $948,838
    Assets (EOY)
    $5,301,828
  • 2019 · 990

    Revenue
    $933,429
    Expenses
    $963,228
    Assets (EOY)
    $4,968,085
  • 2018 · 990

    Revenue
    $946,947
    Expenses
    $940,092
    Assets (EOY)
    $4,891,839
  • 2017 · 990

    Revenue
    $899,783
    Expenses
    $879,238
    Assets (EOY)
    $4,922,777
  • 2016 · 990

    Revenue
    $882,378
    Expenses
    $839,066
    Assets (EOY)
    $4,872,096
  • 2015 · 990

    Revenue
    $879,160
    Expenses
    $815,757
    Assets (EOY)
    $4,803,551
  • 2014 · 990

    Revenue
    $867,631
    Expenses
    $797,811
    Assets (EOY)
    $4,739,679
  • 2013 · 990

    Revenue
    $831,825
    Expenses
    $802,025
    Assets (EOY)
    $4,657,065
  • 2012 · 990

    Revenue
    not reported
    Expenses
    $767,239
    Assets (EOY)
    $4,597,677

Nonprofiteer parses Forms 990, 990-EZ and 990-PF, in a window of recent tax years. These returns are recorded from the IRS e-file index, so their figures were extracted by that index rather than read from the return here — treat them as a different source from the filings above, not as more of the same record. A dash means the index carries no figure; Form 990-T listings carry none at all. Showing the 10 most recent; the API carries the rest.

Grants made

No itemized grants to organizations. Schedule I is filed only by organizations that granted more than $5,000 to a recipient, so most filers have none.

Grants received

The 10 largest by cash amount. The API serves every itemized grant.

Other IRS files

Auto-Revocation List

Not listed. The IRS publishes this list for organizations whose exemption was automatically revoked for failing to file for three consecutive years.

Publication 78

Listed as of 11 November 2026, under deductibility PC.

These are two separate IRS files on two separate schedules, shown as published and not reconciled with each other. Neither is a statement about whether a contribution is deductible today: 19,245 organizations appear in Publication 78 while the IRS's own revocation file lists them as currently revoked, more than half of those revoked before 2019. Absence from Publication 78 is evidence of nothing, and presence is not evidence either. Verify current status with the IRS before relying on it.

What this page reflects

The registration facts above come from the IRS Business Master File published 9 November 2026 and read 9 November 2026, for every organization at once. Returns through tax year 2025, the newest we have parsed for this organization.