top of page
FELLOWSHIP

Meet and share memories with other collectors and enthusiasts!

FUN

The Hart-Parr Oliver Collectors Association is made up of people just like you. Become a member of our family today!

"FINEST IN FARM MACHINERY"

You Respect Hart-Parr History.

You Grew Up With Oliver Machinery.

Welcome Home.

SERVING COLLECTORS SINCE 1989

The Hart-Parr/Oliver Collectors Association, a nonprofit organization, was founded in 1989 for the historical and educational benefit of Hart-Parr and Oliver collectors and the general public. It now includes nearly 4,500 members and consists of 21 chapters. In its effort to collect, preserve and distribute information on the Hart-Parr/Oliver and related companies, the organization has dedicated itself to the following principles:

 

To help preserve the history of Hart-Parr/Oliver and associated companies acquired by Hart-Parr and Oliver.
 

  1. To promote the history of Hart-Parr/Oliver and related companies.
     

  2. To aid the collectors of Hart-Parr and Oliver tractors, combines and implements in restoration and preservation.
     

  3. To promote the collection and care of Hart-Parr and Oliver machinery, memorabilia and other related items.
     

  4. To assist in the establishment of a museum dedicated to the care, display and interpretation of historical artifacts and equipment associated with the Hart-Parr and Oliver companies.

Bylaws of the HPOCA

app-04.png
  • Facebook - Grey Circle
  • Instagram - Grey Circle
  • X
  • Youtube

UPCOMING EVENTS

  • Greenville Farm Power of the Past
    Greenville Farm Power of the Past
    Thu, Jul 10
    Darke County Fairgrounds
    Jul 10, 2025, 8:00 AM EDT – Jul 13, 2025, 3:00 PM EDT
    Darke County Fairgrounds, 1125 Fort Jefferson Ave, Greenville, OH 45331, USA
    Greenville Farm Power of the Past will be holding its 26th Annual Reunion July 10-13, 2025 at the Darke County Fairgrounds in Greenville, Ohio. Our features are Oliver, Case, Michigan Built Gas-Engines, and Oil Field engines.
    Share
  • 2025 HPOCA National Summer Show
    2025 HPOCA National Summer Show
    Thu, Aug 21
    Aug 21, 2025, 6:00 AM – Aug 24, 2025, 10:00 PM
    Prairie Village, 45205 SD-34, Madison, SD 57042, USA
    Annual Steam Threshing Jamboree Hosted by Great Plains Oliver Collectors Featuring Original Hart-Parr, Oliver, Cletrac and White
    Share
  • Date and time is TBD
    Date and time is TBD
    Wooster, Wooster, OH 44691, USA
    The 2026 HPOCA National Summer Show is scheduled to take place in Wooster, Ohio. Specific dates and additional details have not yet been announced. For the latest updates, please visit the official HPOCA website
    Share
CALL US

Memberships & Renewals

888.400.4962 | 937.610.0236

Editorial & Advertising

828.707.7044

To Order Merchandise

641.228.1099

EMAIL US

Memberships & Renewals

hpoca@sfsdayton.com

Editorial & Advertising

hpolivereditor@gmail.com

Floyd County Historical Museum

To Order Merchandise

fcmiowa@gmail.com

HOURS

Memberships & Renewals

Mon - Fri: 8:30 am - 5 pm

To Order Merchandise

Tue - Sat: 9 am - 4 pm

CELEBRATING OVER 35 YEARS!

In 2024, HPOCA celebrated 35 years in preserving Hart-Parr/Oliver & associated brands' history.

CORPORATE ADDRESS

P.O. Box 703

Jessup, IA 50648-0703

  • Facebook - Grey Circle
  • Instagram - Grey Circle
  • X
  • Youtube

© 2025 Hart-Parr Oliver Collectors Association | Website Design by Ertel Publishing

bottom of page