'McClain' definitions:
McClain -- U.S. County in Oklahoma
From: Gazetteer 2000
Name :
McClain -- U.S. County in Oklahoma
Population (2000) :
27740
Housing Units (2000) :
11189
Land area (2000) :
569.667522 sq. miles (1475.432046 sq. km)
Water area (2000) :
10.463227 sq. miles (27.099632 sq. km)
Total area (2000) :
580.130749 sq. miles (1502.531678 sq. km)
Located within :
Oklahoma (OK), FIPS 40
Location :
35.037094 N, 97.468017 W