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Oil and Gas County Code Master List

With Data for 2021   |  Release Date:  February 25, 2022   |  Next Release Date: February 2023

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The County Code Master List (CCML) provides the EIA standard county name spellings and codes for use in the Form EIA-23L, Annual Report of Domestic Oil and Natural Gas Reserves.

Oil and Gas County Code Master List 2021

Table of Counties in Major U.S. Shale Plays

More about the County Code Master List

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