Quinn O’Connell (11) and Loudoun County are primed for another deep playoff run in the Virginia 4A tournament while Stone Bridge (left) is looking to get back to the state semifinals in 5A. (Ricky Carioti/WASHINGTON POST)

The Virginia volleyball region playoffs are underway this week as teams from across the state compete for the chance to earn a trip to the state semifinals next week at VCU’s Siegel Center. Last season, No. 3 Stone Bridge and No. 5 Langley advanced to the Virginia AAA semifinals, but this fall, they’ll compete in the 5A and 6A North regions, respectively.

No. 1 Loudoun County, the lone area team to win a state title last season, is in the new 4A North region, where it will continue its quest for a sixth state title in the last seven years.

Each classification is divided into two regions, and from 1A-4A each region has one eight-team section. In Class 5A, the North region has 12 teams and the South region has eight. And in Class 6A, the North region has 16 teams compared to eight teams in the South. The champion and runner-up in each region advance to the state semifinals. Region quarterfinal play begins Tuesday and the region finals will be played Nov.14-16. The region champion and runner-up will head to Richmond for the state tournament Nov. 20-23.

Below is a look at what Northern Virginia teams will face on their road to a state title.

Virginia 6A North region

No. 1 seeds: Madison (27-2), South County (24-5), Osbourn Park (20-8), Chantilly (13-7)

Potential matchups to watch:

● Madison vs. W.T. Woodson or Osbourn Park, region semifinal

● Madison vs. Langley, region final

Skinny: The largest region pool has 16 area teams and two are ranked in The Post Top 10: Langley and Madison. The Warhawks are riding a seven game winning streak, including a 6A Conference 6 title last week. W.T. Woodson’s Eliza Fisher has posted an area leading 366 kills and the Cavaliers (19-4) should make for a formidable opponent if they face Madison in the region semifinal. Madison and Langley met earlier this season, and Langley won at home in five sets giving the Warhawks their first loss of a season. A very deep Madison roster that features outside hitters Marissa Roy and Amy O’Connor will have home-court advantage if they meet in the final. South County has reeled off 12 straight wins, including the 6A Conference 7 title.

Virginia 5A North region

No. 1 seeds: Stone Bridge (22-2), Brook Point

Potential matchups to watch:

● Stone Bridge vs. Jefferson, region semifinal

● Stone Bridge vs. Broad Run or Tuscarora, region final

Skinny: No. 3 Stone Bridge is a heavy favorite in the 5A North region. The Bulldogs defeated the other top seed Brook Point in straight sets Sept. 21 and defeated Albemarle earlier in the season, both are district champions. Broad Run (19-9) and Tuscarora (18-6) could face each other in the region semifinal, Spartans senior Taylor Austin was named the Conference 14 Libero and Player of the Year. The Spartans defeated the Huskies in their two previous meetings this season. If Stone Bridge is able to sift through this region they will likely face Kellam or Atlee in the state semifinals. Kellam defeated Atlee in the Class AAA title game last year and both moved to 5A this season.

Virginia 4A North region

No. 1 seeds: Loudoun County (26-0), Salem

Potential matchups to watch:

● Loudoun County vs. Fluvanna or Carroll County, region semifinal

● Loudoun County vs. Salem, region final

Skinny: The top-ranked Raiders are led by Conference 21 Player of the Year outside hitter Navy-bound Maggie Phillips and all-Conference hitter and North Carolina recruit Taylor Borup. The Raiders haven’t lost a set since Sept. 10 and are arguably the best team in the state of Virginia. With so much talent on the roster it would take a major letdown for them not to win its sixth state title in seven years.

Virginia 3A East region

No. 1 seeds: Loudoun Valley (15-9), Warhill

Potential matchups to watch:

● Loudoun Valley vs. Lafayette, region semifinal

● Loudoun Valley vs. Warhill or Kettle Run, region final

Skinny: The Vikings are the lone area team in this region and enter the tournament as a top-seed after winning the Conference 28 tournament. Loudoun Valley is led by Conference 28 Player of the Year setter/outside hitter senior Olivia Barnhardt. The Vikings are in unfamiliar territory in the region playoffs, the only team they’ve faced is William Monroe. It will be interesting to see if the Vikings can make their first state tournament appearance since 2009 when they defeated South County for the Class AAA title.