This report examines cooperative interaction among development organizations in 16 Iowa counties. Several sets of organizational characteristics were found to relate to levels of interorganizational relations (lOR). Organizations that were well-established, prestigious, and perceived as being effective tended to report the most intensive interaction with other units. The presence of formalized rules and procedures was associated with more intensive levels of lOR. Organizations with less autonomy in funding and programming reported higher levels of interaction than did the more autonomous groups. Innovative organizations with broad service responsibilities also reported more intensive interaction.