Interstate 820 (I-820[a]) is an auxiliary route of I-20 in Fort Worth, Texas, of approximately 35.173 miles (56.605 km) around the city and some of its suburbs.

The name, however, is not commonly used; the colloquial reference by the general public is "Loop 820", or simply just 820.

Continuing to the north, the Interstate begins to turn to the northeast as it approaches Lake Worth.

Continuing toward the south, I-820 leaves Hurst and reenters the Fort Worth city limits.

Heading south through eastern Fort Worth, I-820 has a second junction with I-30, also at a stack interchange.

After the interchange, the freeway continues south to a junction at SH 180 (Lancaster Avenue) and Spur 303 (Rosedale Street) near Lake Arlington.

The loop is often considered the most congested road in North Texas, with the interchanges at Rufe Snow Drive, Holiday Lane, and Denton Highway (US 377) being named the first, second, and third worst, respectively, in 2010.

[8] The North Tarrant Express (NTE) was a construction project that was supposed to add additional lanes, high-occupancy toll lanes, and continuous frontage roads and reconstruct the interchange with I-35W and various other interchanges between I-35W and SH 121/SH 183.