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Newmar Kountry Star 3721

Class Abuilt 2005–05Better build tierScarce on the used market
WHAT ONE COSTS
$106,500est. used (2005, 21 yr old; from 16 priced floorplans of this line)
THE SPECS
Length37.2 ft
Height (incl. A/C)12.1 ft
Width8.5 ft
Interior height6.7 ft
GVWR29,500 lb
Dry weightnot published
Sleeps6
Fresh water105 gal
Grey water65 gal
Black water45 gal
Fuel100 gal
Engine / chassisCummins ISB 330 hp diesel pusher · Freightliner

A missing row means the maker never published that figure: unknown, not zero.

WHERE PEOPLE SLEEP
  • 1× Rear bed(Permanent)—
  • 1× Sofa(Convertible)—
  • 1× Dinette(Convertible)—
HOW IT'S BUILT: 4/5
WallsLaminated fiberglass
FrameSteel
RoofWalk-on
UnderbellyEnclosed

Newmar (Better tier): Newmar

YEAR BY YEAR: WHAT CHANGED
  • 2005Introduced
FINDING ONE

Scarce: months of watching; be ready to fly and drive it home. Why: only one model year; 21 years out of production. Estimated from build volume and production span, not a count of live listings.

OUR TAKE

Sibling of the 3720 with a different living-area arrangement.

OTHER KOUNTRY STAR FLOORPLANS
3354 · 28,000 lb · sleeps 43355 · 29,500 lb · sleeps 63412 · 33,400 lb · sleeps 63418 · 33,400 lb · sleeps 63426 · 33,400 lb · sleeps 43509 · 32,000 lb · sleeps 43510 · 32,000 lb · sleeps 63623 · 32,000 lb · sleeps 43624 · 32,000 lb · sleeps 63709 · 37,500 lb · sleeps 63717 · 37,500 lb · sleeps 63720 · 29,500 lb · sleeps 43907 · 32,000 lb · sleeps 43908 · 32,000 lb · sleeps 4the whole line →
Find one for sale

Live listings for the 3721 on the big marketplaces. Each search opens pre-filled with this exact floorplan:

RV Trader ↗Camping World ↗FB Marketplace ↗Google ↗

Inventory varies by site and day. Slim pickings? search the whole Kountry Star line ↗

Is the 3721 your #1, or just a spec sheet?

These are the facts. Whether it beats the other six thousand rigs for you depends on what you care about. Set your priorities as sliders, switch on your hard limits, and watch the whole market re-rank around them. Every exclusion explained, every margin shown.

See where it ranks for you →

Data compiled from dealer and aggregator listings, retrieved 2026-07.