The tourists scored 10 tries as they outclassed the weakest opponents of the tour.
A crowd of 20,071 at the Hunter Stadium saw Alex Cuthbert, Conor Murray, Stuart Hogg and Geroge North score in the opening 20 minutes before Welsh winger North and Richard Hibbard added further scores to give Warren Gatland's side a 38-0 lead at the interval.
Gatland's side, who entered the game on the back of three successive victories with a hard-fought 22-12 win against the Queensland Reds on Saturday following disappointingly one-sided wins against the Barbarians and Western Force, failed to maintain the onslaught after the break although there were further tries from captain Brian O'Driscoll, Leigh Halfpenny, Sean O'Brien and Jonathan Davies.
Impressive fly-half Hogg added four first-half conversions while Halfpenny added three more after coming on as a half-time replacement for North.
Still mulling his best selection as the tour moves inexorably towards the three-Test series, Gatland tried out a few new combinations against an opposition that was a mix of New South Wales and Queensland players from Super Rugby, big city clubs and more modest bush outfits and would have been impressed with some clinical finishing in the opening period and a lack of injuries.
There was another eye-catching display by Wales openside flanker Justin Tipuric that could keep some pressure on tour captain Sam Warburton, who is expected to lead the Lions against New South Wales Waratahs in Sydney this weekend.
But the New Zealander probably learned more about his players in the first 20 minutes on Saturday when his side were under the cosh from the Reds than he has in the other 220 minutes of action on the tour. There were a number of unforced errors by Lions players, especially when it came to handling under pressure, and with a little more luck the Country XV would have scored at least one consolation try.
The Country XV, comprising an electrician, apprentice plumber and a medical student, were inevitably outpaced by a team of elite athletes but the home fans did get excited after an interception try by replacement Dale Ah-Wang. However it was ruled out after consultation with the video referee following a knock-on.
Questions will inevitably rage about the quality of the Lions' fourth tour opponents and they have now scored 214 points and 28 tries.
It took the Lions just seven minutes to post their opening try, which followed a spell of sustained pressure and came following a trademark burst from Tipuric. With the Country defence at sixes and sevens, O'Driscoll then had the simple task of putting an unmarked Cuthbert over in the corner.
Hogg, handed the fly-half role and kicking duties instead of rested pair Jonathan Sexton and Owen Farrell, nonchalantly landed the touchline conversion before the Lions added two further touchdowns in three minutes.
Murray claimed the first after more impressive approach work by Tipuric, then Hogg scorched through a huge gap for another touchdown, while one further conversion made it 19-0 after just 12 minutes.
The Country XV enjoyed a spell of pressure deep inside the Lions' 22, gaining a couple of attacking lineouts, but when Tipuric snaffled turnover ball it led to a thrilling break-out.
North fed full-back Sean Maitland 80 metres out and the Scotland international went flat out for the corner before delivering an inside pass to North, who finished. Hogg's successful conversion took the Lions 26 points clear.
Despite the scoreline, there was a degree of dogged determination about the largely semi-professional Country side, yet predictably they had no answer to the Lions' pace or quality of support play.
And further tries followed before the break for Hibbard, following some strong close-quarter forward work, and North.
Gatland made two half-time substitutions as Halfpenny replaced North, with Maitland switching to the wing, and lock Alun-Wyn Jones took over from Richie Gray.
O'Driscoll got the scoreboard moving after half-time when he crossed on a simple overlap, before Halfpenny's pace took him clear for another touchdown that he also converted to bring up the half-century.
Scotland prop Ryan Grant joined Alex Corbisiero in making his Lions debut when he replaced the England loosehead after 50 minutes, when Gatland also sent on Rory Best for Hibbard and Matt Stevens instead of Dan Cole.
And when centre Davies took over from Roberts, it meant only scrum-half Mike Phillips had not left the Lions bench with more than 20 minutes remaining.
Phillips then arrived, and the final quarter was merely a case of how many more tries the Lions would score, but only two more materialised when O'Brien powered over and Davies followed suit, Halfpenny adding the extras on each occasion.