Mrs Stevens (28), who describes herself as a ''stay-at-home mum'', farms on Mount Benger Station with her husband Tony.
She won a by-election to fill a vacancy after only three nominations were received for the four-person board at the last election.
She is the youngest elected to the board, which was renamed last year after being known as the Roxburgh Community Board since its inception in 1989.
Voting in the by-election closed yesterday.
Of the two candidates vying for the seat, Mrs Stevens received 344 votes, while Norman Dalley, of Coal Creek, received 164.
Asked what prompted her to stand, Mrs Stevens said: ''At the last election, I saw there was nobody keen to do it and I saw a job that needed to be done. This is a good wee community and it's good to be involved in keeping it going.''
The couple moved to the Teviot Valley from northern Southland in 2011 and have three young children - a 5-year-old and two preschoolers.
Mrs Stevens is a member of the Roxburgh Plunket and Teviot Valley Educare committees.
In Southland, she was actively involved in the community through Plunket, playgroup, rugby, squash and racing clubs.
''I think it's important to get involved in things, wherever you live, and look forward to adding a rural viewpoint to the board as well as being the only woman on the board.''
She will be sworn in at the board meeting on Thursday, February 20.
The 508 votes cast in the by-election represented a 41% return.
