Allpress rode Captain Cruising to win, taking her tally for the season to 159, three ahead of the runner-up, Matthew Cameron.
She had the title sealed after race 6 with two remaining races on the programme.
"I just feel relieved, but gutted for Matty, but I guess that is just me. He has been a wonderful competitor and deserves it just as much as me," Allpress said.
The premiership has been close between Allpress and Cameron over the past few weeks.
Allpress (37) was accompanied to Oamaru by her husband, Karl, and sons, Josh (7) and Angus (4) for the final meeting of the season.
"Karl has been a wonderful support as a stay-at-home dad in recent times," Allpress said.
"I would also like to thank all the owners and trainers and others who have supported me throughout the season."
Lisa and Karl have a property at Waverly in the area where Lisa (nee Mumby) served a four-year apprenticeship with Kevin Gray.
Karl has a licence to train. He previously worked for Gray and Jon Sargent, the trainer of Captain Cruising and other winners for Allpress this season.
Allpress has ridden in Singapore, Macau, Malaysia and Japan.
"Japan was something special as I was only the second woman licensed to ride there," she said.
It will be business as usual for Allpress next weekend. She has several rides at the Grand National meeting including Superturf in the Winter Cup.
Superturf won the race last year when ridden by Masa Tanaka.
Allpress is the second female to top the New Zealand jockeys' premiership. Lisa Cropp achieved the feat in 2004-05 with a then record 197 wins and the two following seasons with 146.
Cropp had her final win of 2004-05 on Bus Us in the last race of the season at Oamaru.
Jon Sargent set the springboard for his new Australian venture when he achieved a record New Zealand training tally of 111 wins at Oamaru yesterday.
Sargent won races with Captain Cruising, Essential, Bokkie Bokkie and Hydrogen (on promotion).
"It is just a fantastic result," Sargent said last night.
Sargent bettered the record of 108 wins set by Mark Walker in 2009-10. Sargent finished second to Walker (now in Singapore) that season with 80 wins.
He was runner-up to Michael Pitman in the premiership with 75 wins last year.
Sargent, who has his main base at Matamata with a stable at Riccarton, is setting up a stable at Warwick Farm, Sydney. Andrew Carston, who has been in charge of the Riccarton stable for two years, will transfer to Sydney next week. His twin sister, Michelle, a former jockey, will take charge of the Riccarton stable which has contributed 39 wins to the Sargent tally this season.
"Andrew and Michelle have done a great job at Riccarton," Sargent said.
Magic Shaft, winner of the Matamata Slipper and runner-up in the Manawatu Breeders' Stakes, will join the Sydney stable on Monday. The Sargent-trained Quintessential, winner of the Queensland Oaks and runner-up in the Queensland Derby, will also race out of Warwick Farm.
Sargent (53) began training at Woodville, then moved to Otaki and Awapuni. He then spent five years training in Penang and won the premiership there in 2000. He has been back in New Zealand for 10 years.
He is the owner of Essential, one of three wins for jockey Kylie Williams in catch rides yesterday. She also won on Electronic Motion and Stradbroke City, the replacement each time for Lee Callaway, who was stood down after a fall in the hurdles.
He dislocated his shoulder.
Williams made it four wins when she rode Bokkie Bokkie, who was having her first start in the Sargent colours of black with yellow shamrocks and quartered cap. Bokkie Bokkie was having her first race for 10 months.
