Post-effective Amendment (investment Company, Rule 485(b)) (485bpos)

AS FILED WITH THE U.S. SECURITIES AND EXCHANGE COMMISSION ON April 9, 2020

1933 Act Registration File No.: 333-227298

1940 Act File No.: 811-23377

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933	x
Pre‑Effective Amendment No. ___	o
Post‑Effective Amendment No. 19	x
and/or
REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940	x
Amendment No. 20	x

TIDAL ETF TRUST

(Exact Name of Registrant as Specified in Charter)

898 North Broadway, Suite 2

Massapequa, New York 11758

(Address of Principal Executive Offices, Zip Code)

(Registrant’s Telephone Number, including Area Code) [phone]

The Corporation Trust Company

1209 Orange Street

Corporation Trust Center

Wilmington, DE 19801

(Name and Address of Agent for Service)

Copies to:

Eric W. Falkeis Tidal ETF Services LLC 898 North Broadway, Suite 2 Massapequa, New York 11758	Christopher M. Cahlamer Godfrey & Kahn, S.C. 833 East Michigan Street, Suite 1800 Milwaukee, Wisconsin 53202

It is proposed that this filing will become effective (check appropriate box):

	x	immediately upon filing pursuant to paragraph (b)
	o	on (date) pursuant to paragraph (b)
	o	60 days after filing pursuant to paragraph (a)(1)
	o	on (date) pursuant to paragraph (a)(1)
	o	75 days after filing pursuant to paragraph (a)(2)
	o	on (date) pursuant to paragraph (a)(2) of rule 485

Explanatory note: This Post-Effective Amendment No. 19 to the registration statement of Tidal ETF Trust (the “Trust”) is filed for the sole purpose of submitting the XBRL exhibits for the risk return summary for its series: Aware Ultra-Short Duration Enhanced Income Fund.

---

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended (the “Securities Act”), and the Investment Company Act of 1940, as amended, the Registrant certifies that it meets all of the requirements for effectiveness of this Post‑Effective Amendment No. 19 to its Registration Statement on Form N-1A under Rule 485(b) under the Securities Act and has duly caused this Post‑Effective Amendment No. 19 to its Registration Statement to be signed on its behalf by the undersigned, duly authorized, in the City of Milwaukee, State of Wisconsin, on April 9, 2020.

Tidal ETF Trust

By:/s/ Eric W. Falkeis

Eric W. Falkeis

President

Pursuant to the requirements of the Securities Act, this Post-Effective Amendment No. 19 to the Registrant’s Registration Statement has been signed below by the following persons in the capacities indicated on April 9, 2020.

Signature	Title
/s/ Eric W. Falkeis	President (principal executive officer), Trustee, Chairman, and Secretary
Eric W. Falkeis
*Dusko Culafic	Trustee
Dusko Culafic
*Mark H. W. Baltimore	Trustee
Mark H. W. Baltimore
*Ian C. Carroll	Trustee
Ian C. Carroll
*Eduardo Mendoza	Trustee
Eduardo Mendoza
/s/ Daniel H. Carlson	Treasurer (principal financial officer and principal accounting officer)
Daniel H. Carlson
*By:/s/ Eric W. Falkeis Eric W. Falkeis, Attorney-in-Fact pursuant to Powers of Attorney previously filed

---

EXHIBIT LIST

Exhibit	Exhibit No.
Instance Document	EX-101.INS
Schema Document	EX-101.SCH
Calculation Linkbase Document	EX-101.CAL
Definition Linkbase Document	EX-101.DEF
Label Linkbase Document	EX-101.LAB
Presentation Linkbase Document	EX-101.PRE