Juxtapose the United States districts against this:
Title 12 Section 222
The continental United States, excluding Alaska, shall be divided into not less than eight nor more than twelve districts. Such districts may be readjusted and new districts may from time to time be created by the Board of Governors of the Federal Reserve System, not to exceed twelve in all:
Provided
That the districts shall be apportioned with due regard to the convenience and customary course of business and shall not necessarily be coterminous with any State or States. Such districts shall be known as Federal reserve districts and may be designated by number. When the State of Alaska or Hawaii is hereafter admitted to the Union the Federal Reserve?[1] districts shall be readjusted by the Board of Governors of the Federal Reserve System in such manner as to include such State. Every national bank in any State shall, upon commencing business or within ninety days after admission into the Union of the State in which it is located, become a member bank of the Federal Reserve System by subscribing and paying for stock in the Federal Reserve bank of its district in accordance with the provisions of this chapter and shall thereupon be an insured bank under the Federal Deposit Insurance Act [12 U.S.C. 1811 et seq.], and failure to do so shall subject such bank to the penalty provided by section 501a of this title.
(Dec. 23, 1913, ch. 6, §?2 (part), 38 Stat. 251; Aug. 23, 1935, ch. 614, title II, §?203(a), 49 Stat. 704; Pub. L. 85–508, §?19, July 7, 1958, 72 Stat. 350; Pub. L. 86–3, §?17, Mar. 18, 1959, 73 Stat. 12.)
AND
Title 12 Section 223
A Federal reserve district shall contain only one Federal reserve city.
(Dec. 23, 1913, ch. 6, §?2 (part), 38 Stat. 251.)
AND
Title 12 Section 224
The organization of reserve districts and Federal reserve cities shall not be construed as changing the present status of reserve cities except in so far as this chapter changes the amount of reserves that may be carried with approved reserve agents located therein.
(Dec. 23, 1913, ch. 6, §?2 (part), 38 Stat. 253; Pub. L. 86–114, §?3(b)(5), July 28, 1959, 73 Stat. 264.)
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As you can see the Federal Reserve System has its own CITIES and DISTRICTS [Capitus Maximus].