The 2015 Lamar Hunt U.S. Open Cup tournament proper featured teams from all five tiers of men's soccer of the American Soccer Pyramid.

All teams from the first three levels qualify. For the fourth and fifth tiers of the pyramid, a series of qualification and state tournaments are held to determine the berths into the tournament. These teams complete the 91-team field in the U.S. Open Cup.

On February 4, 2015, the NPSL announced 7 of the 12 NPSL sides for the US Open Cup listed below. Each of these teams was a playoff team from the previous season:^[1]

• Brooklyn Italians
• Chattanooga FC
• GBFC Thunder
• Lansing United
• Miami United F.C.
• Tulsa Athletics
• Upward Stars

On March 20, 2015, 3 additional teams were announced leaving 2 spots to be claimed.^[2]

• Detroit City FC
• Fort Pitt FC Regiment
• Virginia Beach City FC

On March 21, 2015, Sonoma County Sol qualified out of the Golden Gate Conference, leaving 1 team to qualify.

On March 22, 2015 FC Tacoma 253 became the final team to qualify.

West Region - Northwest Conference qualifying tournament

	Playoff
	FC Tacoma 253		2
	Spartans Futbol Club		1

FC Tacoma 253 v Spartans Futbol Club

February 20, 2015 Final	FC Tacoma 253	2–1	Spartans Futbol Club	Tukwila, Washington
	Jacobson 27' Vaughn 32'			Stadium: Starfire Sports Complex

Winner advances to West Region - Conference Playoff

West Region - Conference Playoff

	Playoff
	FC Tacoma 253		6
	San Diego Flash		1

FC Tacoma 253 v San Diego Flash

March 22nd Final	FC Tacoma 253	6–1	San Diego Flash	Seattle, Washington
2pm PDT	Milan 9', 72' (pen.) Shaxton 16', 86' Vaughn 47' Goudley 81'		Valle-Ortiz 52' (pen.)	Stadium: Memorial Stadium Referee: Raul Sheran

FC Tacoma 253 advances to Open Cup

The USASA was allocated 11 qualifying spots in this years tournament.

The USASA adopted new qualification standards for the 2014 tournament citing earlier qualifying deadlines by USSF. They will now use the results from the previous calendar years tournaments to determine regional qualifiers. Region I has already adopted that their qualifiers will be the regional champion of both the USASA National Cup and the USASA US Amateur Cup. Other regions have yet to announce who they will qualify.^[4]

More information Region, Qualification method ...

Region	Qualification method	Qualified team
I	Amateur Cup Regional Champion	NY Greek-American Atlas[4]
I	Open Cup Regional Champion	Maryland Bays[4]
II	TBD	KC Athletics
II	TBD	Madison Fire
III	Open Cup Regional Champion	Triangle Brigade[5]
III	Open Cup Regional Runner-up	NTX Rayados[5]
IV	Open Cup Regional Champion	Chula Vista FC
IV	Open Cup Regional Runner-Up	Cal FC
WC	TBD	Mass Premier Soccer
WC	TBD	PSA Elite
WC	TBD	RWB Adria

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San Francisco City FC

Tournament took place between March 13 and March 15 at the Overland Park Soccer Complex in Overland Park, Kansas.^[6] 6 teams participated for one spot in the US Open Cup. The following teams competed. Colorado Rovers S.C.(Golden, CO), KC Athletics (Prairie View, KS), Monaco F.C. (Denver, CO), Colorado Sporting Premier (Auorora, CO), ASC Newstars (Houston, TX), Harpo's F.C.(Boulder, CO) ^[7]

The KC Athletics and Harpo's FC advanced to the final with KC winning 3–1. However, Harpo's FC advanced as well as KC to the US Open Cup due to KC Athletics having already qualified through USASA Region 2. They would again meet in the preliminary round of the Open Cup, with Harpo's FC advancing with a 2–1 victory.